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

:root {
    --blue: #0F766E;
    --blue-light: #2DD4BF;
    --blue-mid: #1976D2;
    --blue-dark: #115E59;
    --red: #7C3AED;
    --red-light: #A78BFA;
    --red-mid: #D32F2F;
    --red-dark: #6D28D9;
    --white: #FFFFFF;
}

html,
body {
    height: 100%;
    font-family: 'Sora', sans-serif;
    overflow: hidden;
}

body {
    background: #0a0e1a;
    position: relative;
}

/* ── BACKGROUND ── */
.bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    background: linear-gradient(135deg, #0d1b3e 0%, #0a0e1a 50%, #1a0505 100%);
    overflow: hidden;
}

.bg-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.55;
    animation: blobFloat 8s ease-in-out infinite alternate;
}

.b1 {
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, #0F766E, #115E59);
    top: -120px;
    left: -120px;
    animation-duration: 9s;
}

.b2 {
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, #7C3AED, #4C1D95);
    bottom: -100px;
    right: -100px;
    animation-duration: 11s;
    animation-delay: -3s;
}

.b3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #134E4A, #0F766E);
    bottom: 10%;
    left: 20%;
    animation-duration: 7s;
    animation-delay: -1.5s;
    opacity: 0.35;
}

.b4 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, #E53935, #7C3AED);
    top: 20%;
    right: 15%;
    animation-duration: 10s;
    animation-delay: -5s;
    opacity: 0.30;
}

@keyframes blobFloat {
    0% {
        transform: translate(0, 0) scale(1)
    }

    100% {
        transform: translate(30px, 20px) scale(1.08)
    }
}

.grid-overlay {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 48px 48px;
}

.particles {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    overflow: hidden; /* hạt trang trí không thò ra mép viewport (mobile) */
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    animation: particleDrift linear infinite;
}

@keyframes particleDrift {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 0.6;
    }

    100% {
        transform: translateY(-10vh) rotate(720deg);
        opacity: 0;
    }
}

/* ── LAYOUT ── */
.page {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.auth-wrapper {
    width: 100%;
    max-width: 460px;
}

.card {
    background: rgba(12, 20, 48, 0.65);
    backdrop-filter: blur(28px) saturate(1.5);
    -webkit-backdrop-filter: blur(28px) saturate(1.5);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 24px;
    padding: 2.2rem 2.2rem;
    box-shadow: 0 0 0 1px rgba(45, 212, 191, 0.25), 0 32px 80px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    animation: cardAppear 0.7s cubic-bezier(0.23, 1, 0.32, 1) both;
    position: relative;
}

@keyframes cardAppear {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.96)
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1)
    }
}

/* ── LOGO ── */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
    margin-bottom: 1.6rem;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--blue), var(--red));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(45, 212, 191, 0.5), 0 2px 8px rgba(139, 124, 246, 0.4);
    animation: iconPulse 3s ease-in-out infinite;
    flex-shrink: 0;
}

@keyframes iconPulse {

    0%,
    100% {
        box-shadow: 0 4px 20px rgba(45, 212, 191, 0.5), 0 2px 8px rgba(139, 124, 246, 0.4);
    }

    50% {
        box-shadow: 0 4px 30px rgba(45, 212, 191, 0.8), 0 2px 12px rgba(139, 124, 246, 0.6);
    }
}

.logo-icon svg {
    width: 22px;
    height: 22px;
}

.logo-text {
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(90deg, var(--blue-light) 0%, var(--white) 40%, var(--red-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── FORM TITLE ── */
.form-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 0.25rem;
    letter-spacing: -0.02em;
    text-align: center;
}

.form-subtitle {
    font-size: 0.79rem;
    color: rgba(255, 255, 255, 0.45);
    margin-bottom: 1.3rem;
    line-height: 1.5;
    text-align: center;
}

/* ── FIELD ── */
.field {
    margin-bottom: 0.85rem;
}

.or-divider {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0.2rem 0 0.85rem;
}

.or-divider::before,
.or-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.10);
}

.or-divider span {
    font-size: 0.72rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.30);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.field-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 0.35rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.field-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.field-icon {
    position: absolute;
    left: 14px;
    width: 17px;
    height: 17px;
    color: rgba(255, 255, 255, 0.3);
    pointer-events: none;
    z-index: 2;
    transition: color 0.25s;
}

.field-wrap:focus-within .field-icon {
    color: var(--blue-light);
}

.field input {
    width: 100%;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.10);
    border-radius: 12px;
    padding: 0.68rem 1rem 0.68rem 2.7rem;
    color: var(--white);
    font-family: 'Sora', sans-serif;
    font-size: 0.88rem;
    outline: none;
    transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}

.field input::placeholder {
    color: rgba(255, 255, 255, 0.22);
}

.field input:focus {
    border-color: var(--blue);
    background: rgba(45, 212, 191, 0.12);
    box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.2);
}

.toggle-eye {
    position: absolute;
    right: 13px;
    background: none;
    border: none;
    cursor: pointer;
    color: rgba(255, 255, 255, 0.28);
    padding: 0;
    display: flex;
    align-items: center;
    transition: color 0.2s;
}

.toggle-eye:hover {
    color: rgba(255, 255, 255, 0.65);
}

/* ── TERMS ── */
.terms {
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.30);
    text-align: center;
    margin-bottom: 0.9rem;
    line-height: 1.5;
}

.terms a {
    color: rgba(255, 255, 255, 0.50);
    text-decoration: underline;
}

/* ── BUTTON ── */
.btn-main {
    width: 100%;
    padding: 0.88rem;
    border: none;
    border-radius: 13px;
    cursor: pointer;
    font-family: 'Sora', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
    transition: transform 0.18s, box-shadow 0.3s;
    margin-bottom: 1.1rem;
}

.btn-bg {
     position: absolute;
     inset: 0;
     background: linear-gradient(135deg, var(--red) 0%, var(--red-mid, #D32F2F) 50%, var(--red-dark, #6D28D9) 100%);
     transition: opacity 0.3s;
 }

 .btn-bg-hover {
     position: absolute;
     inset: 0;
     background: linear-gradient(135deg, var(--red-mid, #D32F2F), var(--red-light, #A78BFA));
     opacity: 0;
     transition: opacity 0.3s;
 }

.btn-main:hover .btn-bg-hover {
    opacity: 1;
}

.btn-main:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(139, 124, 246, 0.45);
}

.btn-main:active {
    transform: scale(0.98);
}

.btn-label {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2.5px solid rgba(255, 255, 255, 0.35);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg)
    }
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    transform: scale(0);
    animation: rippleAnim 0.65s linear;
    pointer-events: none;
    z-index: 3;
}

@keyframes rippleAnim {
    to {
        transform: scale(4);
        opacity: 0
    }
}

/* ── DIVIDER & SOCIALS ── */
.divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1.2rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.10);
}

.divider span {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.30);
    white-space: nowrap;
}

.socials {
    display: flex;
    gap: 10px;
    margin-bottom: 1.1rem;
}

.btn-social {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.10);
    border-radius: 11px;
    padding: 0.6rem;
    color: rgba(255, 255, 255, 0.70);
    font-family: 'Sora', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.15s;
}

.btn-social:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.22);
    color: var(--white);
    transform: translateY(-1px);
}

/* ── SWITCH LINK ── */
.switch-text {
    text-align: center;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.40);
}

.switch-text a {
    color: var(--red-light);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.switch-text a:hover {
    text-decoration: underline;
}

/* ── SUCCESS OVERLAY ── */
.success-overlay {
    position: absolute;
    inset: 0;
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(12, 20, 48, 0.90);
    border-radius: 22px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s;
}

.success-overlay.show {
    opacity: 1;
    pointer-events: all;
}

.check-circle {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blue), var(--red));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    box-shadow: 0 0 40px rgba(45, 212, 191, 0.5);
    animation: checkPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes checkPop {
    from {
        transform: scale(0) rotate(-90deg)
    }

    to {
        transform: scale(1) rotate(0)
    }
}

.check-circle svg {
    width: 34px;
    height: 34px;
}

.check-path {
    stroke-dasharray: 40;
    stroke-dashoffset: 40;
    animation: drawCheck 0.5s 0.3s ease forwards;
}

@keyframes drawCheck {
    to {
        stroke-dashoffset: 0
    }
}

.success-title {
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.success-sub {
    color: rgba(255, 255, 255, 0.45);
    font-size: 0.82rem;
}

/* ── ERROR TOAST ── */
.error-toast {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(139, 124, 246, 0.90);
    color: var(--white);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.65rem 1.1rem;
    border-radius: 10px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 30;
}

.error-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ── FIELD INLINE ERRORS ── */
.field-error {
    display: block;
    font-size: 0.75rem;
    color: #A78BFA;
    margin-top: 0.35rem;
    padding-left: 0.25rem;
    min-height: 0;
    line-height: 1.4;
}

.field.has-error .field-wrap {
    border-radius: 12px;
    box-shadow: 0 0 0 2px rgba(239, 83, 80, 0.45);
}

.field.has-error input {
    border-color: #A78BFA;
    background: rgba(239, 83, 80, 0.08);
}
/* ── AUTH SPLIT LAYOUT (2026-07-09) ─────────────────────────────────────────
   HTML login/register đã chuyển sang layout 2 cột (.auth-split: form trái,
   brand canvas phải) nhưng CSS chưa được viết — card bung full-width và
   nội dung brand rớt xuống dưới dạng text thô. Block này dùng CHUNG cho
   login.css và register.css (giữ 2 bản đồng bộ). */

.auth-split {
    width: 100%;
    max-width: 1180px;
    display: grid;
    grid-template-columns: minmax(0, 500px) minmax(0, 1fr);
    gap: 3rem;
    align-items: center;
}

.auth-form-side {
    min-width: 0;
}

.auth-form-side .card {
    max-width: 460px;
    margin: 0 auto;
}

.auth-brand-side {
    min-width: 0;
}

.brand-canvas {
    position: relative;
    overflow: hidden;
    border-radius: 28px;
    border: 1px solid rgba(255, 255, 255, 0.10);
    background: rgba(10, 14, 30, 0.55);
    backdrop-filter: blur(24px) saturate(1.4);
    -webkit-backdrop-filter: blur(24px) saturate(1.4);
    padding: 3.2rem 3rem;
    min-height: 540px;
    display: flex;
    align-items: center;
    box-shadow: 0 32px 80px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.06);
    animation: cardAppear 0.7s cubic-bezier(0.23, 1, 0.32, 1) 0.12s both;
}

.brand-glow {
    position: absolute;
    width: 340px;
    height: 340px;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.32;
    pointer-events: none;
}

.brand-glow--amber   { top: -80px;  right: -60px; background: #f59e0b; }
.brand-glow--indigo  { bottom: -100px; left: -80px; background: #6366f1; }
.brand-glow--emerald { top: 40%; left: 55%; background: #10b981; opacity: 0.2; }

.brand-canvas-content {
    position: relative;
    z-index: 1;
}

.brand-canvas-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.76rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #93c5fd;
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.30);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 1.4rem;
}

.brand-canvas-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 10px #4ade80;
    animation: brandDotPulse 2s ease-in-out infinite;
}

@keyframes brandDotPulse {
    50% { opacity: 0.35; }
}

.brand-canvas-title {
    font-size: clamp(2rem, 3vw, 2.8rem);
    line-height: 1.15;
    font-weight: 800;
    color: #f8fafc;
    margin: 0 0 1rem;
}

.brand-canvas-grad {
    background: linear-gradient(90deg, #60a5fa, #c084fc, #f472b6);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.brand-canvas-sub {
    color: rgba(226, 232, 240, 0.75);
    font-size: 0.98rem;
    line-height: 1.65;
    max-width: 46ch;
    margin: 0 0 2.2rem;
}

.brand-canvas-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem 2.4rem;
    margin-bottom: 2.2rem;
}

.brand-stat-num {
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
}

.brand-stat-lbl {
    font-size: 0.8rem;
    color: rgba(226, 232, 240, 0.6);
    margin-top: 2px;
}

.brand-canvas-foot {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.brand-pill {
    font-size: 0.8rem;
    color: rgba(241, 245, 249, 0.85);
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 6px 12px;
    border-radius: 999px;
}

/* Tablet/mobile: ẩn brand canvas, form về 1 cột giữa màn hình */
@media (max-width: 1023px) {
    .auth-split {
        grid-template-columns: minmax(0, 1fr);
        max-width: 520px;
    }
    .auth-brand-side {
        display: none;
    }
}