/* ============================================================
   SUBSTRAT — PUAN HESAPLAMA
   KOZMİK / DARK / GLASS
============================================================ */


/* ============================================================
   ROOT
============================================================ */

:root {
    --sidebar-width: 266px;

    --bg: #05070b;
    --bg-soft: #090b10;

    --glass: rgba(8, 10, 15, 0.72);
    --glass-light: rgba(20, 21, 27, 0.62);

    --border: rgba(255,255,255,0.11);
    --border-strong: rgba(255,255,255,0.20);

    --text: #ffffff;
    --text-soft: #e7e7eb;
    --text-muted: #8e919b;

    --purple: #a96cff;
    --purple-bright: #c18aff;

    --radius: 15px;
}


/* ============================================================
   RESET
============================================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;

    overflow-x: hidden;

    background: var(--bg);

    color: var(--text);

    font-family:
        Arial,
        Helvetica,
        sans-serif;
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

a {
    text-decoration: none;
    color: inherit;
}


/* ============================================================
   KOZMİK ARKA PLAN
============================================================ */

.space-background {
    position: fixed;

    inset: 0;

    z-index: -10;

    background:
        radial-gradient(
            circle at 72% 18%,
            rgba(128,64,190,0.14),
            transparent 27%
        ),

        radial-gradient(
            circle at 30% 80%,
            rgba(78,72,145,0.08),
            transparent 30%
        ),

        url("galeri/arkaplan.png")
        center center /
        cover
        fixed
        no-repeat;
}

.space-background::after {
    content: "";

    position: absolute;

    inset: 0;

    background:
        linear-gradient(
            90deg,
            rgba(0,0,0,0.48),
            rgba(0,0,0,0.16)
        );
}


/* ============================================================
   STARS
============================================================ */

.stars {
    position: fixed;

    inset: 0;

    pointer-events: none;

    z-index: -8;

    opacity: 0.45;
}

.stars-1 {
    background-image:
        radial-gradient(
            circle,
            rgba(255,255,255,.7) 1px,
            transparent 1px
        );

    background-size: 130px 130px;
}

.stars-2 {
    background-image:
        radial-gradient(
            circle,
            rgba(255,255,255,.35) 1px,
            transparent 1px
        );

    background-size: 210px 210px;

    opacity: .25;
}


/* ============================================================
   SIDEBAR
============================================================ */

.sidebar {
    position: fixed;

    left: 0;
    top: 0;
    bottom: 0;

    width: var(--sidebar-width);

    padding: 28px 20px;

    background:
        linear-gradient(
            180deg,
            rgba(5,7,10,0.92),
            rgba(4,5,7,0.78)
        );

    border-right:
        1px solid rgba(255,255,255,0.10);

    backdrop-filter: blur(22px);

    z-index: 50;

    display: flex;
    flex-direction: column;
}


/* ============================================================
   BRAND
============================================================ */

.brand {
    display: flex;

    align-items: center;

    gap: 13px;

    padding:
        5px
        8px
        34px;
}

.brand-symbol {
    color: #ffffff;

    font-size: 29px;

    line-height: 1;

    text-shadow:
        0 0 18px
        rgba(180,100,255,0.65);
}

.brand-text {
    display: flex;

    flex-direction: column;

    gap: 3px;
}

.brand-text strong {
    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: 25px;

    font-weight: 600;

    letter-spacing: 1.8px;

    color: #ffffff;
}

.brand-text span {
    color: #aeb0b6;

    font-size: 9px;
}


/* ============================================================
   SIDEBAR MENU
============================================================ */

.sidebar-menu {
    display: flex;

    flex-direction: column;

    gap: 7px;
}

.menu-item {
    height: 50px;

    display: flex;

    align-items: center;

    gap: 15px;

    padding:
        0
        16px;

    color: #ededed;

    border:
        1px solid
        transparent;

    border-radius: 11px;

    font-size: 14px;

    transition: .25s ease;
}

.menu-item:hover {
    background:
        rgba(255,255,255,0.06);

    border-color:
        rgba(255,255,255,0.09);
}

.menu-icon {
    width: 20px;

    display: inline-flex;

    justify-content: center;

    color: #dedee2;

    font-size: 17px;
}

.menu-item.active {
    background:
        linear-gradient(
            100deg,
            rgba(255,255,255,0.16),
            rgba(125,60,180,0.17)
        );

    border-color:
        rgba(255,255,255,0.24);

    box-shadow:
        inset 3px 0
        var(--purple),

        0 0 28px
        rgba(125,45,190,0.10);
}


/* ============================================================
   SIDEBAR BOTTOM
============================================================ */

.sidebar-bottom {
    margin-top: auto;
}


/* ============================================================
   QUOTE
============================================================ */

.sidebar-quote {
    padding:
        0
        10px
        26px;
}

.quote-line {
    width: 70px;

    height: 1px;

    margin-bottom: 14px;

    background:
        linear-gradient(
            90deg,
            var(--purple),
            transparent
        );
}

.sidebar-quote p {
    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: 18px;

    font-style: italic;

    line-height: 1.25;

    color: #d9d9dd;
}

.sidebar-quote span {
    display: block;

    margin-top: 12px;

    color: #85858c;

    font-size: 8px;

    letter-spacing: 4px;
}


/* ============================================================
   SIDEBAR CARD
============================================================ */

.sidebar-card {
    min-height: 145px;

    padding: 20px;

    border:
        1px solid
        rgba(255,255,255,0.13);

    border-radius: 14px;

    background:
        rgba(20,21,25,0.58);

    backdrop-filter: blur(15px);

    box-shadow:
        0 15px 40px
        rgba(0,0,0,0.35);
}

.sidebar-card small {
    display: block;

    color: #92959e;

    font-size: 9px;

    letter-spacing: 3px;
}

.sidebar-card strong {
    display: block;

    margin:
        12px
        0
        19px;

    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: 18px;

    font-weight: 500;

    line-height: 1.25;

    color: #ffffff;
}

.sidebar-card button {
    width: 100%;

    height: 36px;

    display: flex;

    align-items: center;

    justify-content: space-between;

    padding:
        0
        13px;

    border:
        1px solid
        rgba(255,255,255,0.15);

    border-radius: 8px;

    background:
        rgba(255,255,255,0.05);

    color: #eeeeef;

    font-size: 11px;

    transition: .2s ease;
}

.sidebar-card button:hover {
    background:
        rgba(255,255,255,0.09);

    border-color:
        rgba(255,255,255,0.25);
}

.sidebar-card button span {
    font-size: 16px;
}


/* ============================================================
   MAIN
============================================================ */

.main-content {
    width:
        calc(100% - var(--sidebar-width));

    margin-left:
        var(--sidebar-width);

    min-height: 100vh;

    padding:
        18px
        26px
        60px;
}


/* ============================================================
   TOPBAR
============================================================ */

.topbar {
    height: 66px;

    display: flex;

    align-items: center;

    gap: 20px;

    margin-bottom: 18px;
}


/* ============================================================
   SEARCH
============================================================ */

.top-search {
    height: 48px;

    flex: 1;

    max-width: 850px;

    display: flex;

    align-items: center;

    padding:
        0
        15px;

    border:
        1px solid
        rgba(255,255,255,.12);

    border-radius: 13px;

    background:
        rgba(7,9,14,.72);

    backdrop-filter: blur(15px);
}

.top-search input {
    flex: 1;

    min-width: 0;

    border: 0;

    outline: 0;

    background: transparent;

    color: #ffffff;

    padding:
        0
        12px;

    font-size: 14px;
}

.top-search input::placeholder {
    color: #898c96;
}

.search-left-icon,
.search-right-icon {
    color: #e0e1e5;

    font-size: 22px;

    line-height: 1;
}

.search-right-icon {
    opacity: .65;
}


/* ============================================================
   TOPBAR RIGHT
============================================================ */

.topbar-right {
    margin-left: auto;

    display: flex;

    align-items: center;

    gap: 9px;
}

.topbar-button {
    position: relative;

    width: 47px;

    height: 47px;

    display: grid;

    place-items: center;

    border:
        1px solid
        rgba(255,255,255,.12);

    border-radius: 50%;

    background:
        rgba(12,14,19,.80);

    color: #eeeeef;

    font-size: 18px;
}

.topbar-button:hover {
    border-color:
        rgba(180,115,255,.35);
}

.notification-dot {
    position: absolute;

    top: 9px;

    right: 10px;

    width: 6px;

    height: 6px;

    border-radius: 50%;

    background: #c07aff;
}

.topbar-login {
    height: 47px;

    display: flex;

    align-items: center;

    padding:
        0
        17px;

    border:
        1px solid
        rgba(255,255,255,.12);

    border-radius: 11px;

    background:
        rgba(12,14,19,.80);

    color: #eeeeef;

    font-size: 11px;

    font-weight: 600;

    transition: .2s ease;
}

.topbar-login:hover {
    border-color:
        rgba(255,255,255,.25);
}

.topbar-register {
    height: 47px;

    display: flex;

    align-items: center;

    padding:
        0
        19px;

    border:
        1px solid
        #ffffff;

    border-radius: 11px;

    background: #ffffff;

    color: #111111;

    font-size: 11px;

    font-weight: 700;

    transition: .2s ease;
}

.topbar-register:hover {
    background: #e9e9ec;

    border-color: #e9e9ec;
}


/* ============================================================
   PAGE
============================================================ */

.puan-page {
    width: 100%;
}


/* ============================================================
   PAGE HEADER
============================================================ */

.page-header {
    min-height: 205px;

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 30px;

    padding:
        30px
        38px;

    border:
        1px solid
        rgba(255,255,255,.12);

    border-radius: 18px;

    background:
        linear-gradient(
            105deg,
            rgba(7,9,14,.88),
            rgba(12,10,19,.73)
        );

    backdrop-filter: blur(18px);

    box-shadow:
        0 25px 70px
        rgba(0,0,0,.28);

    overflow: hidden;

    position: relative;
}

.page-header::before {
    content: "";

    position: absolute;

    width: 350px;

    height: 350px;

    right: 10%;

    top: -230px;

    border-radius: 50%;

    background:
        radial-gradient(
            circle,
            rgba(155,77,255,.13),
            transparent 68%
        );

    pointer-events: none;
}

.page-header-left {
    position: relative;

    z-index: 2;
}

.page-label {
    display: flex;

    align-items: center;

    gap: 12px;

    color: #c0c2c8;

    font-size: 10px;

    letter-spacing: 5px;
}

.page-label span,
.page-label i {
    display: block;

    height: 1px;

    background: var(--purple);
}

.page-label span {
    width: 28px;
}

.page-label i {
    width: 58px;
}

.page-header h1 {
    margin-top: 15px;

    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: clamp(42px, 4vw, 58px);

    font-weight: 400;

    line-height: .95;

    color: #ffffff;
}

.page-header h1 span {
    display: block;

    color: #d5b9ef;
}

.page-header p {
    max-width: 650px;

    margin-top: 17px;

    color: #9699a2;

    font-size: 13px;

    line-height: 1.6;
}


/* ============================================================
   HEADER INFO CARD
============================================================ */

.header-info-card {
    min-width: 250px;

    min-height: 125px;

    display: flex;

    align-items: center;

    gap: 16px;

    padding:
        20px;

    border:
        1px solid
        rgba(255,255,255,.11);

    border-radius: 14px;

    background:
        rgba(10,12,18,.65);

    position: relative;

    z-index: 2;
}

.header-info-symbol {
    width: 48px;

    height: 48px;

    display: grid;

    place-items: center;

    border:
        1px solid
        rgba(169,108,255,.28);

    border-radius: 50%;

    background:
        rgba(169,108,255,.10);

    color: #d4b0ff;

    font-size: 20px;
}

.header-info-card small {
    display: block;

    color: #737680;

    font-size: 8px;

    letter-spacing: 3px;
}

.header-info-card strong {
    display: block;

    margin-top: 9px;

    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: 20px;

    font-weight: 400;

    line-height: 1.1;
}


/* ============================================================
   EXAM TABS
============================================================ */

.exam-tabs {
    display: flex;

    gap: 8px;

    margin-top: 20px;

    margin-bottom: 14px;
}

.exam-tab {
    min-width: 145px;

    height: 48px;

    display: flex;

    align-items: center;

    gap: 12px;

    padding:
        0
        17px;

    border:
        1px solid
        rgba(255,255,255,.10);

    border-radius: 10px;

    background:
        rgba(7,9,14,.68);

    color: #7e818a;

    font-size: 12px;

    font-weight: 600;

    transition: .22s ease;
}

.exam-tab span {
    color: #555861;

    font-size: 9px;

    letter-spacing: 2px;
}

.exam-tab:hover {
    color: #ffffff;

    border-color:
        rgba(169,108,255,.30);
}

.exam-tab.active {
    color: #ffffff;

    background:
        linear-gradient(
            100deg,
            rgba(255,255,255,.13),
            rgba(125,60,180,.14)
        );

    border-color:
        rgba(255,255,255,.22);

    box-shadow:
        inset 3px 0 var(--purple),
        0 0 25px
        rgba(125,45,190,.08);
}

.exam-tab.active span {
    color: #c18aff;
}


/* ============================================================
   CALCULATOR CARD
============================================================ */

.calculator-card {
    width: 100%;

    padding:
        30px
        32px
        32px;

    border:
        1px solid
        rgba(255,255,255,.12);

    border-radius: 17px;

    background:
        rgba(7,9,14,.78);

    backdrop-filter: blur(18px);

    box-shadow:
        0 25px 65px
        rgba(0,0,0,.22);
}


/* ============================================================
   CALCULATOR TOP
============================================================ */

.calculator-top {
    display: flex;

    align-items: flex-end;

    justify-content: space-between;

    gap: 25px;

    padding-bottom: 24px;

    margin-bottom: 22px;

    border-bottom:
        1px solid
        rgba(255,255,255,.08);
}

.section-label {
    display: flex;

    align-items: center;

    gap: 9px;

    color: #999ca5;

    font-size: 9px;

    letter-spacing: 4px;
}

.section-label::before {
    content: "";

    width: 20px;

    height: 1px;

    background: var(--purple);
}

.calculator-title h2 {
    margin-top: 10px;

    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: 31px;

    font-weight: 400;

    color: #ffffff;
}

.calculator-title p {
    margin-top: 7px;

    color: #858892;

    font-size: 11px;
}

.total-net {
    min-width: 155px;

    padding:
        14px
        20px;

    border:
        1px solid
        rgba(255,255,255,.10);

    border-radius: 11px;

    background:
        rgba(255,255,255,.025);

    text-align: right;
}

.total-net span {
    display: block;

    color: #777b85;

    font-size: 8px;

    letter-spacing: 2px;
}

.total-net strong {
    display: block;

    margin-top: 4px;

    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: 29px;

    font-weight: 500;

    color: #ffffff;
}


/* ============================================================
   HIDDEN
============================================================ */

.hidden {
    display: none !important;
}


/* ============================================================
   LESSON HEADING
============================================================ */

.lesson-heading {
    display: grid;

    grid-template-columns:
        minmax(210px, 1fr)
        120px
        120px
        110px;

    gap: 12px;

    padding:
        0
        14px
        9px;

    color: #666a74;

    font-size: 8px;

    letter-spacing: 2px;
}

.lesson-heading span:not(:first-child) {
    text-align: center;
}


/* ============================================================
   LESSONS
============================================================ */

.lessons {
    display: flex;

    flex-direction: column;

    gap: 8px;
}


/* ============================================================
   LESSON CARD
============================================================ */

.lesson-card {
    position: relative;

    display: grid;

    grid-template-columns:
        minmax(210px, 1fr)
        120px
        120px
        110px;

    align-items: center;

    gap: 12px;

    min-height: 73px;

    padding:
        10px
        12px
        10px
        15px;

    border:
        1px solid
        rgba(255,255,255,.08);

    border-radius: 11px;

    background:
        linear-gradient(
            100deg,
            rgba(18,20,27,.72),
            rgba(9,11,16,.66)
        );

    transition:
        border .2s ease,
        background .2s ease,
        transform .2s ease;
}

.lesson-card::before {
    content: "";

    position: absolute;

    left: 0;

    top: 15px;

    bottom: 15px;

    width: 2px;

    border-radius: 2px;

    background:
        transparent;

    transition: .2s ease;
}

.lesson-card:hover {
    transform: translateX(2px);

    border-color:
        rgba(169,108,255,.25);

    background:
        linear-gradient(
            100deg,
            rgba(23,20,31,.84),
            rgba(9,11,16,.76)
        );
}

.lesson-card:hover::before {
    background: var(--purple);
}


/* ============================================================
   LESSON INFO
============================================================ */

.lesson-info {
    min-width: 0;
}

.lesson-name {
    color: #f2f2f4;

    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: 18px;

    font-weight: 500;
}

.lesson-question {
    display: block;

    margin-top: 4px;

    color: #686c76;

    font-size: 9px;
}


/* ============================================================
   INPUT GROUP
============================================================ */

.input-group {
    display: flex;

    flex-direction: column;

    align-items: center;

    gap: 5px;
}

.input-group label {
    color: #656872;

    font-size: 8px;

    letter-spacing: 1px;
}

.input-group input {
    width: 82px;

    height: 37px;

    border:
        1px solid
        rgba(255,255,255,.10);

    border-radius: 8px;

    outline: none;

    background:
        rgba(255,255,255,.035);

    color: #ffffff;

    text-align: center;

    font-size: 13px;

    transition: .2s ease;
}

.input-group input::placeholder {
    color: #4f525a;
}

.input-group input:focus {
    border-color:
        rgba(169,108,255,.55);

    background:
        rgba(169,108,255,.07);

    box-shadow:
        0 0 18px
        rgba(169,108,255,.08);
}


/* Chrome / Edge number arrows */

.input-group input::-webkit-inner-spin-button,
.input-group input::-webkit-outer-spin-button {
    opacity: .35;
}


/* ============================================================
   NET BOX
============================================================ */

.net-box {
    height: 49px;

    display: flex;

    flex-direction: column;

    justify-content: center;

    align-items: center;

    border:
        1px solid
        rgba(169,108,255,.14);

    border-radius: 9px;

    background:
        rgba(169,108,255,.045);
}

.net-box small {
    color: #77717f;

    font-size: 7px;

    letter-spacing: 2px;
}

.net-box strong {
    margin-top: 2px;

    color: #d6b5f7;

    font-size: 14px;

    font-weight: 600;
}


/* ============================================================
   INVALID LESSON
============================================================ */

.lesson-card.invalid {
    border-color:
        rgba(255,90,90,.38);

    background:
        rgba(80,20,25,.14);
}

.lesson-card.invalid::before {
    background:
        #ff6262;
}

.lesson-warning {
    position: absolute;

    left: 15px;

    bottom: -19px;

    color: #ff7373;

    font-size: 9px;

    z-index: 5;
}


/* ============================================================
   OBP
============================================================ */

.obp-area {
    margin-top: 27px;

    padding:
        22px
        20px;

    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 25px;

    border:
        1px solid
        rgba(255,255,255,.09);

    border-radius: 12px;

    background:
        rgba(255,255,255,.025);
}

.obp-description h3 {
    margin-top: 8px;

    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: 22px;

    font-weight: 400;
}

.obp-description p {
    margin-top: 5px;

    color: #777b85;

    font-size: 10px;
}

.obp-input-area {
    display: flex;

    align-items: center;

    gap: 13px;
}

.input-wrapper {
    height: 49px;

    display: flex;

    align-items: center;

    padding:
        0
        13px;

    border:
        1px solid
        rgba(255,255,255,.11);

    border-radius: 9px;

    background:
        rgba(5,7,11,.72);
}

.input-wrapper input {
    width: 85px;

    border: 0;

    outline: 0;

    background: transparent;

    color: #ffffff;

    font-size: 16px;

    text-align: center;
}

.input-wrapper span {
    color: #555963;

    font-size: 10px;
}

.obp-value {
    min-width: 78px;

    height: 49px;

    display: flex;

    flex-direction: column;

    align-items: center;

    justify-content: center;

    border:
        1px solid
        rgba(169,108,255,.18);

    border-radius: 9px;

    background:
        rgba(169,108,255,.06);
}

.obp-value small {
    color: #77717f;

    font-size: 7px;

    letter-spacing: 2px;
}

.obp-value strong {
    margin-top: 2px;

    color: #d7b8f8;

    font-size: 17px;
}


/* ============================================================
   CALCULATE BUTTON
============================================================ */

.calculate-button {
    width: 100%;

    height: 55px;

    margin-top: 16px;

    display: flex;

    align-items: center;

    justify-content: space-between;

    padding:
        0
        20px;

    border:
        1px solid
        rgba(255,255,255,.18);

    border-radius: 10px;

    background:
        linear-gradient(
            100deg,
            rgba(255,255,255,.10),
            rgba(169,108,255,.13)
        );

    color: #ffffff;

    font-size: 12px;

    font-weight: 600;

    transition: .22s ease;
}

.calculate-button strong {
    font-size: 20px;

    font-weight: 400;

    color: #d7b8f8;
}

.calculate-button:hover {
    border-color:
        rgba(255,255,255,.32);

    background:
        linear-gradient(
            100deg,
            rgba(255,255,255,.15),
            rgba(169,108,255,.20)
        );

    box-shadow:
        0 0 30px
        rgba(169,108,255,.08);
}


/* ============================================================
   RESULTS CARD
============================================================ */

.results-card {
    margin-top: 18px;

    padding:
        27px
        30px
        30px;

    border:
        1px solid
        rgba(255,255,255,.11);

    border-radius: 17px;

    background:
        rgba(7,9,14,.74);

    backdrop-filter: blur(18px);
}


/* ============================================================
   RESULTS HEADER
============================================================ */

.results-header {
    display: flex;

    align-items: center;

    justify-content: space-between;

    padding-bottom: 20px;

    margin-bottom: 18px;

    border-bottom:
        1px solid
        rgba(255,255,255,.07);
}

.results-header h2 {
    margin-top: 9px;

    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: 27px;

    font-weight: 400;

    color: #ffffff;
}

.results-symbol {
    width: 45px;

    height: 45px;

    display: grid;

    place-items: center;

    border:
        1px solid
        rgba(169,108,255,.20);

    border-radius: 50%;

    background:
        rgba(169,108,255,.06);

    color: #cda8fa;

    font-size: 17px;
}


/* ============================================================
   RESULT GRID
============================================================ */

.result-grid {
    display: grid;

    grid-template-columns:
        repeat(4, minmax(0,1fr));

    gap: 9px;
}

.result-item {
    min-height: 104px;

    display: flex;

    flex-direction: column;

    justify-content: space-between;

    padding:
        17px;

    border:
        1px solid
        rgba(255,255,255,.08);

    border-radius: 11px;

    background:
        rgba(255,255,255,.025);

    transition: .2s ease;
}

.result-item:hover {
    border-color:
        rgba(169,108,255,.22);

    background:
        rgba(169,108,255,.035);
}

.result-item span {
    color: #777b85;

    font-size: 8px;

    letter-spacing: 1.5px;

    line-height: 1.4;
}

.result-item strong {
    color: #ffffff;

    font-family:
        "Cormorant Garamond",
        Georgia,
        serif;

    font-size: 29px;

    font-weight: 500;
}

.result-item.highlight {
    grid-column: span 2;

    border-color:
        rgba(169,108,255,.20);

    background:
        linear-gradient(
            120deg,
            rgba(169,108,255,.08),
            rgba(255,255,255,.025)
        );
}

.result-item.highlight strong {
    color: #d8b9fa;

    font-size: 34px;
}


/* ============================================================
   RESPONSIVE — 1200
============================================================ */

@media (max-width: 1200px) {

    :root {
        --sidebar-width: 250px;
    }

    .main-content {
        width:
            calc(100% - var(--sidebar-width));

        margin-left:
            var(--sidebar-width);

        padding:
            18px
            20px
            50px;
    }

    .page-header {
        padding:
            27px
            28px;
    }

    .header-info-card {
        min-width: 220px;
    }

    .lesson-heading,
    .lesson-card {
        grid-template-columns:
            minmax(170px, 1fr)
            100px
            100px
            90px;
    }

    .input-group input {
        width: 70px;
    }
}


/* ============================================================
   RESPONSIVE — 950
============================================================ */

@media (max-width: 950px) {

    .topbar-login,
    .topbar-register {
        padding:
            0
            12px;
    }

    .header-info-card {
        display: none;
    }

    .page-header {
        min-height: 180px;
    }

    .result-grid {
        grid-template-columns:
            repeat(2, minmax(0,1fr));
    }

    .result-item.highlight {
        grid-column: span 2;
    }
}


/* ============================================================
   RESPONSIVE — 800
============================================================ */

@media (max-width: 800px) {

    :root {
        --sidebar-width: 0px;
    }

    .sidebar {
        display: none;
    }

    .main-content {
        width: 100%;

        margin-left: 0;

        padding:
            10px
            12px
            40px;
    }

    .topbar {
        height: 56px;

        margin-bottom: 10px;
    }

    .top-search {
        height: 43px;
    }

    .theme-button,
    .notification-button {
        display: none;
    }

    .topbar-login,
    .topbar-register {
        height: 43px;

        font-size: 9px;
    }

    .page-header {
        padding:
            25px
            22px;
    }

    .page-header h1 {
        font-size: 43px;
    }

    .calculator-card,
    .results-card {
        padding:
            22px
            18px;
    }

    .calculator-top {
        align-items: flex-start;

        flex-direction: column;
    }

    .total-net {
        width: 100%;

        text-align: left;
    }

    .lesson-heading {
        display: none;
    }

    .lesson-card {
        grid-template-columns:
            1fr
            75px
            75px
            75px;

        gap: 7px;

        padding:
            12px;
    }

    .lesson-info {
        grid-column: 1;
    }

    .input-group {
        grid-row: 1;

        grid-column: auto;
    }

    .net-box {
        grid-row: 1;

        grid-column: 4;
    }

    .obp-area {
        align-items: flex-start;

        flex-direction: column;
    }

    .obp-input-area {
        width: 100%;
    }

    .input-wrapper {
        flex: 1;
    }

    .input-wrapper input {
        width: 100%;
    }
}


/* ============================================================
   RESPONSIVE — 550
============================================================ */

@media (max-width: 550px) {

    .topbar {
        gap: 6px;
    }

    .top-search {
        max-width: none;
    }

    .topbar-login {
        display: none;
    }

    .topbar-register {
        padding:
            0
            12px;
    }

    .page-header {
        min-height: auto;

        padding:
            23px
            19px;
    }

    .page-header h1 {
        font-size: 37px;
    }

    .page-header p {
        font-size: 11px;
    }

    .exam-tabs {
        width: 100%;
    }

    .exam-tab {
        flex: 1;

        min-width: 0;
    }

    .calculator-title h2 {
        font-size: 27px;
    }

    .lesson-card {
        grid-template-columns:
            minmax(0,1fr)
            61px
            61px
            66px;

        gap: 5px;

        min-height: 69px;

        padding:
            9px;
    }

    .lesson-name {
        font-size: 15px;
    }

    .lesson-question {
        font-size: 8px;
    }

    .input-group input {
        width: 55px;

        height: 34px;
    }

    .net-box {
        height: 45px;
    }

    .result-grid {
        grid-template-columns:
            1fr;
    }

    .result-item.highlight {
        grid-column: span 1;
    }

    .result-item {
        min-height: 90px;
    }

    .result-item strong {
        font-size: 26px;
    }
}

/* =========================================================
   KULLANICI ALANI — PLANLAMA İLE AYNI
========================================================= */

.user-box {

    height: 44px;

    display: flex;

    align-items: center;

    gap: 10px;

    padding: 0 13px 0 7px;

    border:
        1px solid
        rgba(255,255,255,.12);

    border-radius: 23px;

    background:
        rgba(10,11,16,.72);

    font-size: 12px;

    font-weight: 600;

}


.user-avatar {

    width: 32px;
    height: 32px;

    display: flex;

    align-items: center;
    justify-content: center;

    border-radius: 50%;

    border:
        1px solid
        rgba(255,255,255,.28);

    background:
        linear-gradient(
            145deg,
            #777,
            #17171b
        );

}


.user-arrow {

    color: #898991;

}