/* ==========================================================================
   XCOJO OPTICAL MATERIAL DESIGN SYSTEM — SYSTEM STYLESHEET
   ========================================================================== */

:root[data-theme="dark"] {
    --bg-base: #06080c;
    --material-bg: rgba(22, 27, 34, 0.7);
    --material-border: rgba(255, 255, 255, 0.08);
    --material-edge: rgba(255, 255, 255, 0.12);
    --specular-glare: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 60%);
    --refraction-color: rgba(88, 166, 255, 0.1);
    
    /* 100% URL-free, raw geometric background layer: Night Mountain & Horizon Curve */
    --svg-bg-mesh: url("data:image/svg+xml,%3Csvg viewBox='0 0 1000 1000'%3E%3Crect width='1000' height='1000' fill='%23050811'/%3E%3Cpath d='M0 700 Q250 600 500 750 T1000 680 L1000 1000 L0 1000 Z' fill='%230b132b' opacity='0.7'/%3E%3Cpath d='M0 800 Q350 720 700 850 T1000 780 L1000 1000 L0 1000 Z' fill='%231c2541'/%3E%3Ccircle cx='500' cy='1200' r='600' fill='%233a506b' opacity='0.15'/%3E%3C/svg%3E");
    
    --text-primary: #f0f6fc;
    --text-muted: #8b949e;
    --accent-glow: 0 0 20px rgba(88, 166, 255, 0.3);
    --input-focus-border: #58a6ff;
    --error-red: #f85149;
    
    --btn-bg: #f0f6fc;
    --btn-text: #06080c;
}

:root[data-theme="light"] {
    --bg-base: #f4f6f9;
    --material-bg: rgba(255, 255, 255, 0.75);
    --material-border: rgba(0, 0, 0, 0.08);
    --material-edge: rgba(255, 255, 255, 0.6);
    --specular-glare: linear-gradient(135deg, rgba(255,255,255,0.4) 0%, rgba(255,255,255,0) 50%);
    --refraction-color: rgba(0, 102, 255, 0.05);
    
    /* 100% URL-free, raw geometric background layer: Day Mountain & Horizon Curve */
    --svg-bg-mesh: url("data:image/svg+xml,%3Csvg viewBox='0 0 1000 1000'%3E%3Crect width='1000' height='1000' fill='%23eef2f7'/%3E%3Cpath d='M0 700 Q250 630 500 720 T1000 660 L1000 1000 L0 1000 Z' fill='%23dbe2ef' opacity='0.8'/%3E%3Cpath d='M0 780 Q350 740 700 810 T1000 750 L1000 1000 L0 1000 Z' fill='%233f72af' opacity='0.15'/%3E%3Ccircle cx='500' cy='1250' r='650' fill='%239fe2bf' opacity='0.2'/%3E%3C/svg%3E");
    
    --text-primary: #0f141c;
    --text-muted: #57606a;
    --accent-glow: 0 0 20px rgba(0, 102, 255, 0.2);
    --input-focus-border: #0066ff;
    --error-red: #d32f2f;
    
    --btn-bg: #0f141c;
    --btn-text: #ffffff;
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.4s ease;
}

.glass-bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    pointer-events: none;
    background-image: var(--svg-bg-mesh);
    background-size: cover;
    background-position: center bottom;
}

.refraction-lens {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90vw;
    height: 90vh;
    background: radial-gradient(circle, var(--refraction-color) 0%, rgba(0,0,0,0) 80%);
    filter: blur(80px);
}

.app-layout {
    position: relative;
    z-index: 2;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.brand-header {
    padding: 32px;
    display: flex;
    justify-content: center;
}

.brand-logo-text {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -1px;
    color: var(--text-primary);
}

.auth-viewport {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 24px;
}

.material-card {
    background: var(--material-bg);
    border-top: 1px solid var(--material-edge);
    border-left: 1px solid var(--material-edge);
    border-right: 1px solid var(--material-border);
    border-bottom: 1px solid var(--material-border);
    border-radius: 16px;
    width: 100%;
    max-width: 420px;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

.surface-reflection {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--specular-glare);
    pointer-events: none;
    z-index: 5;
}

.form-slider-track {
    display: flex;
    width: 200%;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.form-view {
    width: 50%;
    padding: 40px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s;
}

.form-view.active {
    opacity: 1;
    visibility: visible;
}

.form-slider-track.slide-active {
    transform: translateX(-50%);
}

h2 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.form-lead {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 28px;
}

.input-material-group {
    position: relative;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
}

.input-material-group input {
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--material-border);
    padding: 10px 0 6px 0;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.input-material-group.invalid input {
    border-bottom-color: var(--error-red) !important;
}

.input-material-group label {
    position: absolute;
    left: 0;
    top: 10px;
    color: var(--text-muted);
    font-size: 1rem;
    pointer-events: none;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), font-size 0.3s ease, color 0.3s ease;
}

.input-material-group input:focus ~ label,
.input-material-group input:not(:placeholder-shown) ~ label {
    transform: translateY(-22px);
    font-size: 0.8rem;
    color: var(--input-focus-border);
}

.input-material-group.invalid label {
    color: var(--error-red) !important;
}

.material-indicator {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--input-focus-border);
    transition: width 0.3s ease, left 0.3s ease;
}

.input-material-group input:focus ~ .material-indicator {
    width: 100%;
    left: 0;
    box-shadow: var(--accent-glow);
}

.btn-material-submit {
    background: var(--btn-bg);
    color: var(--btn-text);
    border: none;
    border-radius: 8px;
    padding: 14px;
    font-size: 0.95rem;
    font-weight: 600;
    width: 100%;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    margin-top: 8px;
    transition: background-color 0.3s ease;
}

.btn-glint {
    position: absolute;
    top: 0;
    left: -150%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,255,0) 100%);
    transition: left 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-material-submit:hover .btn-glint {
    left: 150%;
}

.view-switcher {
    margin-top: 24px;
    text-align: center;
    font-size: 0.9rem;
}

.view-switcher p {
    color: var(--text-muted);
}

.link-btn {
    background: none;
    border: none;
    color: var(--input-focus-border);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0 4px;
}

.link-btn:hover {
    text-decoration: underline;
}

.theme-control-dock {
    position: fixed;
    bottom: 24px;
    right: 24px;
}

#themeToggleBtn {
    background: var(--material-bg);
    border: 1px solid var(--material-border);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    color: var(--text-primary);
}

/* Onboarding Engine Modules */
.setup-step {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.setup-step.active {
    display: block;
    opacity: 1;
}

.step-progress-bar {
    width: 100%;
    height: 4px;
    background: var(--material-border);
    border-radius: 2px;
    margin-bottom: 24px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 14.28%;
    background: var(--input-focus-border);
    box-shadow: var(--accent-glow);
    transition: width 0.4s ease;
}

.step-navigation-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 32px;
    gap: 16px;
}

.inline-btn {
    margin-top: 0 !important;
    width: auto !important;
    padding: 12px 32px !important;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--material-border);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
}

.email-suffix-wrapper {
    position: relative;
}

.email-suffix {
    position: absolute;
    right: 0;
    bottom: 8px;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    pointer-events: none;
}

.select-group select {
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--material-border);
    padding: 10px 0 6px 0;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    width: 100%;
    cursor: pointer;
    appearance: none;
}

.select-group select option {
    background-color: var(--bg-base);
    color: var(--text-primary);
}

.select-group select:focus ~ label,
.select-group select:valid ~ label {
    transform: translateY(-22px);
    font-size: 0.8rem;
    color: var(--input-focus-border);
}

.avatar-upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px;
    border: 2px dashed var(--material-border);
    border-radius: 8px;
    text-align: center;
}

.file-name-text {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.terms-scroll-viewport {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--material-border);
    border-radius: 8px;
    height: 120px;
    overflow-y: scroll;
    padding: 12px;
    font-size: 0.85rem;
    line-height: 1.4;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.checkbox-material-group {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.checkbox-material-group input {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

@keyframes shakeNode {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
}

.shake {
    animation: shakeNode 0.25s ease 2;
}

@media (min-width: 768px) {
    .brand-header {
        position: absolute;
        top: 0;
        left: 0;
        justify-content: flex-start;
        padding: 40px 0 0 40px;
    }
}