* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Be Vietnam Pro", sans-serif;
}

h1,
h2,
h3 {
    font-family: 'Patrick Hand', cursive
}

body {
    background: linear-gradient(135deg, #c7a6ff, #a784e6);
    margin: 0;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    color: #2e1f47;
    isolation: isolate;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -3;
    pointer-events: none;
    opacity: 0.34;
    background-image: linear-gradient(rgba(91, 58, 151, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(91, 58, 151, 0.08) 1px, transparent 1px);
    background-size: 52px 52px;
    mask-image: linear-gradient(to bottom, black, transparent 88%);
}

body::after {
    content: "";
    position: fixed;
    width: 440px;
    height: 440px;
    right: -150px;
    bottom: -170px;
    z-index: -2;
    border: 1px solid rgba(255, 255, 255, 0.34);
    border-radius: 50%;
    box-shadow: 0 0 0 28px rgba(255, 255, 255, 0.07), 0 0 0 58px rgba(255, 255, 255, 0.045), 0 0 80px rgba(103, 64, 176, 0.22);
    pointer-events: none;
    animation: orbitDrift 18s linear infinite;
}

.stars {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

.stars::before,
.stars::after {
    content: "";
    position: absolute;
    inset: -20% 0 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.8) 1.3px, transparent 1.3px);
    background-size: 86px 86px;
    opacity: 0.34;
    animation: starDrift 46s linear infinite;
}

.stars::after {
    background-size: 143px 143px;
    opacity: 0.22;
    animation-duration: 66s;
    animation-direction: reverse;
}

.container {
    width: 90%;
    max-width: 1000px;
    margin: 120px auto 0 auto;
    height: 80vh;
    background: linear-gradient(145deg, #caa7f7, #b892eb);
    border-radius: 20px;
    padding: 40px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    padding: 60px 40px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 60px;
    width: 100%;

    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.16);
    border-bottom: 1px solid rgba(255, 255, 255, 0.36);
    backdrop-filter: blur(16px);
    box-shadow: 0 12px 30px rgba(65, 37, 116, 0.08);
}

.logo {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid white;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.7);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: logoGlow 4s ease-in-out infinite;
}

.logo:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 0 24px rgba(255, 255, 255, 0.95), 0 12px 30px rgba(89, 52, 157, 0.28);
}

.nav {
    display: flex;
    align-items: center;
}

.menu-icon {
    display: flex;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    position: fixed;
    top: 18px;
    right: 26px;
    z-index: 2000;
    background: rgba(84, 53, 146, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(8px);
    border-radius: 14px;
    padding: 12px 10px;
    box-shadow: 0 14px 30px rgba(28, 12, 48, 0.18);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.menu-icon:hover {
    transform: translateY(-2px) rotate(-2deg);
    box-shadow: 0 18px 34px rgba(28, 12, 48, 0.25), 0 0 20px rgba(255, 255, 255, 0.22);
}

.menu-icon span {
    width: 28px;
    height: 3px;
    background: #2b1149;
    border-radius: 10px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.menu-icon:hover span:nth-child(1) {
    transform: translateY(-1px);
}

.menu-icon:hover span:nth-child(3) {
    transform: translateY(1px);
}

/* Birthday notice */
.birthday-notice {
    position: absolute;
    top: 106px;
    right: 28px;
    z-index: 900;
    width: min(360px, calc(100% - 56px));
    padding: 10px 12px;
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 12px 28px rgba(65, 37, 116, 0.14);
    overflow: hidden;
}
.appointment-notice {
    position: absolute;
    top: 106px;
    right: 404px;
    z-index: 900;
    width: min(360px, calc(100% - 420px));
    padding: 10px 12px;
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 12px 28px rgba(65, 37, 116, 0.14);
    overflow: hidden;
}

.appointment-notice-label {
    margin-bottom: 5px;
    color: #5a378e;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.appointment-marquee {
    width: 100%;
    overflow: hidden;
    white-space: nowrap;
}

.appointment-ticker {
    display: inline-block;
    padding-left: 100%;
    color: #2e1f47;
    font-size: 12px;
    font-weight: 600;
    will-change: transform;
    animation: appointmentScroll 20s linear infinite;
}

@keyframes appointmentScroll {
    from { transform: translateX(0); }
    to { transform: translateX(-100%); }
}
html[data-theme="dark"] .appointment-notice {
    background: rgba(35, 20, 58, 0.58);
}
html[data-theme="dark"] .appointment-notice-label,
html[data-theme="dark"] .appointment-ticker {
    color:#f7f2ff;
}

/*Responsive for Mobile*/
@media (max-width: 900px) {
    .appointment-notice {
        top: 106px;
        left: 12px;
        right: auto;
        width:min(360px, calc(100% - 24px));
    }

    .birthday-notice {
        top: 190px;
        right: 12px;
    }
}
@media (prefers-reduced-motion: reduce) {
    .appointment-ticker {
        padding-left: 0;
        animation: none;
    }
}

.birthday-notice-label {
    margin-bottom: 5px;
    color: #5a378e;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.birthday-marquee {
    width: 100%;
    overflow: hidden;
    white-space: nowrap;
}

.birthday-ticker {
    display: inline-block;
    padding-left: 100%;
    color: #2e1f47;
    font-size: 12px;
    font-weight: 600;
    will-change: transform;
    animation: birthdayScroll 14s linear infinite;
}

@keyframes birthdayScroll {
    from { transform: translateX(0); }
    to { transform: translateX(-100%); }
}

html[data-theme="dark"] body:has(.birthday-notice) .birthday-notice {
    background: rgba(35, 20, 58, 0.58);
    border-color: rgba(255, 255, 255, 0.16);
}

html[data-theme="dark"] body:has(.birthday-notice) .birthday-notice-label,
html[data-theme="dark"] body:has(.birthday-notice) .birthday-ticker {
    color: #f7f2ff;
}

@media (prefers-reduced-motion: reduce) {
    .birthday-ticker {
        padding-left: 0;
        animation: none;
    }
}

/* Side menu */
.side-menu {
    position: fixed;
    top: 0;
    right: -290px;
    width: 270px;
    height: 100vh;
    background: rgba(30, 16, 52, 0.92);
    backdrop-filter: blur(14px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 80px 30px 40px;
    gap: 22px;
    transition: right 0.35s ease;
    box-shadow: -12px 0 25px rgba(19, 9, 31, 0.2);
    z-index: 1500;
}

.side-menu.active {
    right: 0;
}

.menu-btn {
    color: #ffffff;
    text-decoration: none;
    font-size: 1.05rem;
    font-weight: 600;
    padding: 14px 16px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.menu-btn:hover {
    color: #f6ebff;
    background: rgba(153, 121, 255, 0.18);
    transform: translateX(6px);
    box-shadow: 0 0 18px rgba(197, 173, 255, 0.3);
}

.seatmap {
    display: grid;
    grid-template-columns: repeat(11, 100px);
    grid-auto-rows: 160px;
    gap: 4px;
    justify-content: center;
    margin-top: 40px;
}

.seat {
    border: 1px solid #aaa;
    text-align: center;
    font-size: 13px;
}

.empty-seat {
    background-color: linear-gradient(135deg, #c7a6ff, #a784e6);
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

.aisle {
    background: yellow;
}

.seat {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 6px 10px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.avatar-wrapper {
    width: 52px;
    height: 52px;
    margin-bottom: 6px;
    flex-shrink: 0;
}

.avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 2px solid white;
}

.name {
    font-size: 13px;
    font-weight: bold;
    margin: 0;
    line-height: 1.2;
    max-width: 80px;
    word-break: break-word;
}

.role-tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-top: 6px;
    padding: 5px 7px;
    border-radius: 999px;
    font-size: 9px;
    font-weight: 800;
    line-height: 1.2;
    max-width: 90px;
    word-break: break-word;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.student-avatar {
    width: 100px;
    height: 120px;
    object-fit: cover;
    /* Ảnh không méo */
    border-radius: 8px;
    /* Bo góc nhẹ cho mềm */
    border: 2px solid #fff;
    /* Viền trắng cho nổi */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    /* Đổ bóng nhẹ */
}

/*==== Popup Profile ====*/
.popup {
    position: fixed;
    inset: 0;
    background: rgba(17, 10, 30, 0.62);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    padding: 20px;
}

.popup-content {
    position: relative;
    width: min(520px, 90vw);
    background: linear-gradient(135deg, #ffffff, #f5f0ff);
    border: 1px solid rgba(112, 78, 179, 0.18);
    border-radius: 24px;
    padding: 28px 24px 22px;
    box-shadow: 0 24px 60px rgba(44, 19, 80, 0.28);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 18px;
}

.profile-main {
    flex: 1;
}

.profile-tag {
    display: inline-block;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(124, 77, 224, 0.12);
    color: #4f2c8a;
    margin-bottom: 10px;
    font-weight: 700;
}

.profile-main h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    color: #2b1149;
    margin-bottom: 8px;
}

.role-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 0.85rem;
    font-weight: 700;
    box-shadow: 0 10px 20px rgba(124, 77, 224, 0.25);
}

.role-badge.role-default,
.role-tag.role-default {
    background: linear-gradient(135deg, #c7b4ff, #8a72d8);
    color: #fff;
}

.role-badge.role-red,
.role-tag.role-red {
    background: linear-gradient(135deg, #ff7a7a, #ff4d6d);
    color: #fff;
}

.role-badge.role-flag,
.role-tag.role-flag {
    background: linear-gradient(135deg, #ff6b6b, #e53935 58%, #b71c1c);
    color: #fff;
    box-shadow: 0 8px 18px rgba(198, 40, 40, 0.28);
}

.role-badge.role-gold,
.role-tag.role-gold {
    background: linear-gradient(135deg, #f4c95d, #e9a822);
    color: #4d2d00;
}

.role-badge.role-cyan,
.role-tag.role-cyan {
    background: linear-gradient(135deg, #59d0ff, #1d9bf0);
    color: white;
}

.role-badge.role-green,
.role-tag.role-green {
    background: linear-gradient(135deg, #54d88b, #1faa63);
    color: white;
}

.role-badge.role-orange,
.role-tag.role-orange {
    background: linear-gradient(135deg, #ffbb70, #ff8a3d);
    color: white;
}

.role-badge.role-blue,
.role-tag.role-blue {
    background: linear-gradient(135deg, #6cc2ff, #3d7cff);
    color: white;
}

.role-badge.role-pink,
.role-tag.role-pink {
    background: linear-gradient(135deg, #ff9acc, #ff5ebc);
    color: white;
}

.role-badge.role-amber,
.role-tag.role-amber {
    background: linear-gradient(135deg, #f7d77d, #d49f38);
    color: #3f2a00;
}

.role-badge.role-teal,
.role-tag.role-teal {
    background: linear-gradient(135deg, #6fe7d9, #22b7a8);
    color: #003a33;
}

.role-badge.role-violet,
.role-tag.role-violet {
    background: linear-gradient(135deg, #b08cff, #7d5af5);
    color: white;
}

.profile-body {
    display: grid;
    gap: 12px;
    margin-top: 14px;
    color: #3a2954;
}

.profile-body p {
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid rgba(128, 96, 181, 0.12);
    border-radius: 12px;
}

.role-manager {
    display: grid;
    gap: 10px;
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid rgba(124, 77, 224, 0.12);
}

.role-manager label {
    font-weight: 700;
    color: #452b72;
}

.role-manager select {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid rgba(124, 77, 224, 0.2);
    background: white;
    color: #2e1f47;
    font-size: 1rem;
}

.assign-role-btn {
    padding: 12px 14px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #7c4de0, #5e37af);
    color: white;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 12px 25px rgba(94, 55, 175, 0.26);
}

.assign-role-btn:hover {
    transform: translateY(-2px);
}

.close-popup {
    position: absolute;
    top: 15px;
    right: 15px;
    background: #f0e7ff;
    color: #4c2c8b;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s ease;
}

.close-popup.secondary {
    position: static;
    width: auto;
    height: auto;
    border-radius: 12px;
    padding: 10px 18px;
    margin-top: 18px;
    background: #efe5ff;
}

.close-popup:hover {
    background: #e2d1ff;
    transform: scale(1.05);
}

.close-popup:active {
    transform: scale(0.95);
}

#saveSeat,
#changeSeatRowBtn,
#resetSeat,
#exportPdfBtn,
#loginBtn,
#logoutBtn {
    padding: 10px 16px;
    border-radius: 12px;
    border: none;
    background: linear-gradient(135deg, #a784e6, #7c4de0);
    color: white;
    font-weight: 700;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(105, 73, 169, 0.25);
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

#saveSeat::after,
#changeSeatRowBtn::after,
#resetSeat::after,
#exportPdfBtn::after,
#loginBtn::after,
#logoutBtn::after {
    content: "";
    position: absolute;
    top: 0;
    left: -85%;
    width: 45%;
    height: 100%;
    background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.42), transparent);
    transform: skewX(-18deg);
    transition: left 0.55s ease;
}

#saveSeat:hover::after,
#changeSeatRowBtn:hover::after,
#resetSeat:hover::after,
#exportPdfBtn:hover::after,
#loginBtn:hover::after,
#logoutBtn:hover::after {
    left: 140%;
}

#loginBtn,
#logoutBtn {
    position: static;
    margin: 10px 10px 0 0;
}

#changeSeatRowBtn:hover,
#saveSeat:hover,
#resetSeat:hover,
#exportPdfBtn:hover,
#loginBtn:hover,
#logoutBtn:hover {
    transform: translateY(-2px);
    filter: brightness(1.06);
}

.seatmap-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
    margin: 24px auto 60px;
    width: min(1100px, 90%);
}

.seatmap-actions button {
    min-width: 180px;
    max-width: 290px;
    white-space: normal;
    line-height: 1.4;
}

#welcome-card {
    display: flex;
    align-items: center;
    gap: 12px;

    background: rgba(255, 255, 255, 0.7);
    padding: 10px 16px;
    border-radius: 12px;

    width: fit-content;
    margin: 14px 0 0 5%;
    border: 1px solid rgba(255, 255, 255, 0.46);
    box-shadow: 0 14px 32px rgba(75, 44, 135, 0.14), 0 0 24px rgba(255, 255, 255, 0.24);
    backdrop-filter: blur(12px);
    animation: welcomeFloat 5s ease-in-out infinite;
}

.welcome-title {
    font-size: 16px;
}

.role {
    font-size: 14px;
    opacity: 0.8;
}

.print-title {
    display: none;
}

@keyframes orbitDrift {
    from { transform: rotate(0deg) translateY(0); }
    50% { transform: rotate(180deg) translateY(-16px); }
    to { transform: rotate(360deg) translateY(0); }
}

@keyframes logoGlow {
    0%, 100% { box-shadow: 0 0 15px rgba(255, 255, 255, 0.7); }
    50% { box-shadow: 0 0 26px rgba(255, 255, 255, 0.96), 0 0 36px rgba(150, 111, 232, 0.3); }
}

@keyframes welcomeFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

@keyframes starDrift {
    from { transform: translateY(0); }
    to { transform: translateY(-420px); }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media print {
    @page {
        size: landscape;
        margin: 10mm;
    }

    body {
        background: white;
        color: #111;
    }

    .navbar,
    #loginBtn,
    #logoutBtn,
    #welcome-card,
    .seatmap-actions,
    .popup,
    .stars {
        display: none !important;
    }

    .print-title {
        display: block;
        margin: 0 0 14px;
        color: #24113c;
        font-size: 24px;
        text-align: center;
    }

    .seatmap {
        width: max-content;
        margin: 0 auto;
        transform: scale(0.82);
        transform-origin: top center;
    }

    .seat {
        break-inside: avoid;
    }
}



@media (max-width: 768px) {
    .navbar {
        padding: 16px 18px;
    }

    .logo {
        width: 56px;
        height: 56px;
    }

    #loginBtn,
    #logoutBtn {
        margin: 8px 6px 0 0;
        padding: 10px 13px;
    }

    #welcome-card {
        max-width: calc(100% - 24px);
        margin: 8px 12px 0;
    }

    .seatmap {
        overflow-x: auto;
        display: grid;
        grid-template-columns: repeat(11, 80px);
        grid-auto-rows: 130px;
        width: calc(100% - 24px);
        max-width: 1100px;
        margin: 28px 12px 0;
        justify-content: start;
        padding-bottom: 8px;
    }

    .seat {
        font-size: 10px;
        padding: 4px;
    }

    .avatar-wrapper {
        width: 35px;
        height: 35px;
    }

    .student-avatar {
        width: 80px;
        height: 100px;
    }

    .container {
        width: 95%;
        padding: 30px 10px;
        margin-top: 80px;
    }

    .seatmap-actions {
        width: calc(100% - 24px);
        margin: 18px 12px 44px;
        gap: 10px;
    }

    .seatmap-actions button {
        width: 100%;
        max-width: none;
        min-width: 0;
    }

    .popup {
        align-items: flex-start;
        overflow-y: auto;
        padding: 72px 12px 20px;
    }

    .popup-content {
        width: 100%;
        max-height: none;
        padding: 24px 16px 20px;
    }

    .profile-header {
        align-items: flex-start;
        gap: 12px;
    }

    .student-avatar {
        width: 76px;
        height: 92px;
    }

    .profile-main h2 {
        font-size: 1.7rem;
    }

    .role-badge {
        max-width: 100%;
        flex-wrap: wrap;
    }

    .user-avatar {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        object-fit: cover;
        margin-left: 10px;
    }
}

@media (max-width: 480px) {
    .side-menu {
        width: calc(100vw - 18px);
        right: -100vw;
    }

    .side-menu.active {
        right: 0;
    }

    .profile-header {
        flex-direction: column;
    }

    .student-avatar {
        width: 88px;
        height: 104px;
    }
}

/* Keep the default appointment message visible instead of scrolling off-screen. */
.appointment-ticker.is-empty {
    padding-left: 0;
    white-space: normal;
    animation: none;
}