/* =============================================================
   Federation Annual Revenue Survey — Authentication Design System
   Apple-inspired, flat with subtle depth. Blue brand, true dark mode.
   Self-contained: does not depend on Bootstrap CSS being present.
   ============================================================= */

/* ---------- Design tokens ---------- */
:root {
    color-scheme: light;

    /* Surfaces */
    --bg-base:        #F5F5F7;
    --bg-gradient-a:  rgba(27, 58, 107, 0.08);
    --bg-gradient-b:  rgba(0,  61, 153,  0.06);
    --bg-card:        rgba(255, 255, 255, 0.72);
    --bg-card-solid:  #FFFFFF;
    --bg-subtle:      #FAFAFA;
    --bg-hover:       rgba(0, 0, 0, 0.04);

    /* Lines */
    --border:         rgba(0, 0, 0, 0.08);
    --border-strong:  rgba(0, 0, 0, 0.14);

    /* Text */
    --text-primary:   #1D1D1F;
    --text-secondary: #515155;
    --text-tertiary:  #86868B;

    /* Brand */
    --accent:         #1B3A6B;
    --accent-hover:   #14304E;
    --accent-deep:    #0F2545;
    --accent-soft:    rgba(27, 58, 107, 0.08);
    --accent-ring:    rgba(27, 58, 107, 0.28);

    /* Semantic */
    --success:        #34C759;
    --danger:         #E0212F;
    --danger-soft:    rgba(224, 33, 47, 0.08);
    --warning:        #FF9500;

    /* Shadows */
    --shadow-sm:      0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md:      0 4px 20px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.04);
    --shadow-lg:      0 24px 60px rgba(15, 23, 42, 0.10), 0 4px 12px rgba(15, 23, 42, 0.04);
    --shadow-focus:   0 0 0 4px var(--accent-ring);

    /* Motion */
    --ease:           cubic-bezier(0.32, 0.72, 0, 1);
    --dur-fast:       120ms;
    --dur-med:        200ms;
    --dur-slow:       320ms;

    /* Geometry */
    --radius-sm:      8px;
    --radius-md:      12px;
    --radius-lg:      20px;
}

[data-theme="dark"] {
    color-scheme: dark;

    --bg-base:        #000000;
    --bg-gradient-a:  rgba(27, 58, 107, 0.20);
    --bg-gradient-b:  rgba(0,  61, 153,  0.12);
    --bg-card:        rgba(28, 28, 30, 0.72);
    --bg-card-solid:  #1C1C1E;
    --bg-subtle:      #2C2C2E;
    --bg-hover:       rgba(255, 255, 255, 0.06);

    --border:         rgba(255, 255, 255, 0.08);
    --border-strong:  rgba(255, 255, 255, 0.16);

    --text-primary:   #F5F5F7;
    --text-secondary: #AEAEB2;
    --text-tertiary:  #8E8E93;

    --accent:         #6A8BC4;
    --accent-hover:   #8AA7D8;
    --accent-deep:    #2A4F87;
    --accent-soft:    rgba(106, 139, 196, 0.16);
    --accent-ring:    rgba(106, 139, 196, 0.38);

    --success:        #32D74B;
    --danger:         #FF453A;
    --danger-soft:    rgba(255, 69, 58, 0.12);
    --warning:        #FF9F0A;

    --shadow-sm:      0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md:      0 4px 20px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-lg:      0 24px 60px rgba(0, 0, 0, 0.6), 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Auto dark mode when user hasn't explicitly chosen */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) {
        color-scheme: dark;

        --bg-base:        #000000;
        --bg-gradient-a:  rgba(27, 58, 107, 0.20);
        --bg-gradient-b:  rgba(0,  61, 153,  0.12);
        --bg-card:        rgba(28, 28, 30, 0.72);
        --bg-card-solid:  #1C1C1E;
        --bg-subtle:      #2C2C2E;
        --bg-hover:       rgba(255, 255, 255, 0.06);
        --border:         rgba(255, 255, 255, 0.08);
        --border-strong:  rgba(255, 255, 255, 0.16);
        --text-primary:   #F5F5F7;
        --text-secondary: #AEAEB2;
        --text-tertiary:  #8E8E93;
        --accent:         #6A8BC4;
        --accent-hover:   #8AA7D8;
        --accent-deep:    #2A4F87;
        --accent-soft:    rgba(106, 139, 196, 0.16);
        --accent-ring:    rgba(106, 139, 196, 0.38);
        --success:        #32D74B;
        --danger:         #FF453A;
        --danger-soft:    rgba(255, 69, 58, 0.12);
        --warning:        #FF9F0A;
        --shadow-sm:      0 1px 2px rgba(0, 0, 0, 0.4);
        --shadow-md:      0 4px 20px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.3);
        --shadow-lg:      0 24px 60px rgba(0, 0, 0, 0.6), 0 4px 12px rgba(0, 0, 0, 0.3);
    }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

body.auth-body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro Display',
                 'Segoe UI', 'Roboto', system-ui, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-base);
    background-image:
        radial-gradient(ellipse 1000px 700px at 80% -10%, var(--bg-gradient-a), transparent 60%),
        radial-gradient(ellipse 900px 600px at -10% 110%, var(--bg-gradient-b), transparent 55%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    transition: background-color var(--dur-med) var(--ease), color var(--dur-med) var(--ease);
}

/* ---------- Layout ---------- */
.auth-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 20px 24px;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    -webkit-backdrop-filter: saturate(180%) blur(24px);
    backdrop-filter: saturate(180%) blur(24px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 44px 40px 36px;
    animation: card-in 420ms var(--ease) both;
    transition: background-color var(--dur-med) var(--ease),
                border-color var(--dur-med) var(--ease),
                box-shadow var(--dur-med) var(--ease);
}

.auth-card--wide { max-width: 560px; }

@keyframes card-in {
    from { opacity: 0; transform: translateY(12px) scale(0.985); }
    to   { opacity: 1; transform: none; }
}

/* ---------- Brand ---------- */
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 28px;
}

.brand__mark {
    width: 32px; height: 32px;
    border-radius: 9px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
    display: grid; place-items: center;
    color: #FFFFFF;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.01em;
    box-shadow: 0 6px 16px -4px rgba(27, 58, 107, 0.32);
    flex-shrink: 0;
}

.brand__name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: -0.005em;
}

/* ---------- Typography ---------- */
.auth-heading {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin: 0 0 8px;
    line-height: 1.2;
}

.auth-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    margin: 0 0 28px;
    line-height: 1.45;
}

/* ---------- Form controls ---------- */
.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.form-grid--2col {
    grid-template-columns: 1fr 1fr;
    gap: 12px 12px;
}

@media (max-width: 500px) {
    .form-grid--2col { grid-template-columns: 1fr; }
}

.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.field__label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: -0.003em;
}

.field__input,
.field__select {
    width: 100%;
    height: 44px;
    padding: 0 14px;
    background: var(--bg-card-solid);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    font-size: 15px;
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    transition: border-color var(--dur-fast) var(--ease),
                box-shadow var(--dur-fast) var(--ease),
                background-color var(--dur-med) var(--ease);
}

.field__input::placeholder,
.field__select::placeholder { color: var(--text-tertiary); }

.field__input:hover,
.field__select:hover { border-color: var(--text-tertiary); }

.field__input:focus,
.field__select:focus {
    border-color: var(--accent);
    box-shadow: var(--shadow-focus);
}

.field__input:-webkit-autofill {
    -webkit-text-fill-color: var(--text-primary);
    transition: background-color 5000s ease-in-out 0s;
}

/* Password with inline eye toggle */
.field--password { position: relative; }
.field--password .field__input { padding-right: 44px; }
.field__eye {
    position: absolute;
    right: 6px;
    bottom: 6px;
    width: 32px; height: 32px;
    border-radius: 8px;
    background: transparent;
    border: 0;
    color: var(--text-tertiary);
    display: grid; place-items: center;
    cursor: pointer;
    transition: color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
}
.field__eye:hover { color: var(--text-primary); background: var(--bg-hover); }
.field__eye[data-state="visible"] { color: var(--accent); }
.field__eye svg { width: 18px; height: 18px; display: block; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 46px;
    padding: 0 20px;
    border: 0;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -0.01em;
    cursor: pointer;
    text-decoration: none;
    transition: background-color var(--dur-fast) var(--ease),
                color var(--dur-fast) var(--ease),
                transform 80ms ease-out,
                box-shadow var(--dur-fast) var(--ease);
}

.btn:active { transform: scale(0.985); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn--primary {
    width: 100%;
    background: var(--accent);
    color: #FFFFFF;
    box-shadow: 0 4px 14px -4px rgba(0, 102, 255, 0.5);
}
.btn--primary:hover:not(:disabled) { background: var(--accent-hover); }
[data-theme="dark"] .btn--primary { box-shadow: 0 4px 14px -4px rgba(10, 132, 255, 0.6); }

.btn__spinner {
    width: 16px; height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #FFFFFF;
    border-radius: 50%;
    animation: spin 700ms linear infinite;
}

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

/* ---------- Checkbox ---------- */
.checkbox {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
    font-size: 14px;
    color: var(--text-secondary);
}
.checkbox input { position: absolute; opacity: 0; pointer-events: none; }
.checkbox__box {
    width: 18px; height: 18px;
    border-radius: 5px;
    border: 1.5px solid var(--border-strong);
    background: var(--bg-card-solid);
    display: grid; place-items: center;
    transition: all var(--dur-fast) var(--ease);
    flex-shrink: 0;
}
.checkbox input:focus-visible ~ .checkbox__box {
    border-color: var(--accent);
    box-shadow: var(--shadow-focus);
}
.checkbox input:checked ~ .checkbox__box {
    background: var(--accent);
    border-color: var(--accent);
}
.checkbox input:checked ~ .checkbox__box::after {
    content: '';
    width: 11px; height: 11px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* ---------- Links ---------- */
.link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--dur-fast) var(--ease);
}
.link:hover { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Inline row helpers ---------- */
.row-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 16px 0 20px;
    flex-wrap: wrap;
}

.stack { display: flex; flex-direction: column; gap: 16px; }
.mt-24 { margin-top: 24px; }
.mt-16 { margin-top: 16px; }

/* ---------- Divider ---------- */
.divider {
    display: flex; align-items: center;
    gap: 12px;
    margin: 24px 0;
    color: var(--text-tertiary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.divider::before, .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ---------- Alerts ---------- */
.alert {
    padding: 12px 14px;
    border-radius: var(--radius-md);
    font-size: 14px;
    line-height: 1.5;
    margin-top: 16px;
    border: 1px solid transparent;
    animation: alert-in 280ms var(--ease) both;
}
@keyframes alert-in {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: none; }
}
.alert-danger {
    background: var(--danger-soft);
    border-color: rgba(224, 33, 47, 0.22);
    color: var(--danger);
}
.alert-success {
    background: rgba(52, 199, 89, 0.08);
    border-color: rgba(52, 199, 89, 0.24);
    color: #0F7A2E;
}
[data-theme="dark"] .alert-success { color: #30D158; }

/* ---------- Card footer ---------- */
.auth-meta {
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
}

.page-legal {
    margin-top: 20px;
    font-size: 12px;
    color: var(--text-tertiary);
    text-align: center;
    line-height: 1.7;
}
.page-legal a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
}
.page-legal a:hover { color: var(--text-primary); }

/* ---------- Theme toggle ---------- */
.theme-toggle {
    position: fixed;
    top: 20px; right: 20px;
    width: 40px; height: 40px;
    border-radius: 50%;
    background: var(--bg-card);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    border: 1px solid var(--border);
    display: grid; place-items: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: transform var(--dur-med) var(--ease),
                color var(--dur-fast) var(--ease),
                background-color var(--dur-med) var(--ease);
    z-index: 100;
}
.theme-toggle:hover { color: var(--text-primary); transform: scale(1.06); }
.theme-toggle:active { transform: scale(0.95); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-moon { display: none; }
.theme-toggle .icon-sun  { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun  { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-sun  { display: none; }
    :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
}

/* ---------- Select2 overrides (Register page) ---------- */
.select2-container { width: 100% !important; }
.select2-container--default .select2-selection--single {
    height: 44px !important;
    border: 1px solid var(--border-strong) !important;
    border-radius: var(--radius-md) !important;
    background: var(--bg-card-solid) !important;
    transition: border-color var(--dur-fast) var(--ease),
                box-shadow var(--dur-fast) var(--ease),
                background-color var(--dur-med) var(--ease);
}
.select2-container--default.select2-container--focus .select2-selection--single,
.select2-container--default.select2-container--open .select2-selection--single {
    border-color: var(--accent) !important;
    box-shadow: var(--shadow-focus) !important;
    outline: none !important;
}
.select2-container--default .select2-selection--single .select2-selection__rendered {
    line-height: 42px !important;
    padding: 0 14px !important;
    color: var(--text-primary) !important;
    border: 0 !important;
    background: transparent !important;
    font-weight: 400 !important;
    font-size: 15px !important;
}
.select2-container--default .select2-selection--single .select2-selection__placeholder { color: var(--text-tertiary) !important; }
.select2-container--default .select2-selection--single .select2-selection__arrow {
    height: 42px !important;
    top: 1px !important;
    right: 8px !important;
}
.select2-container--default .select2-selection--single .select2-selection__arrow b {
    border-color: var(--text-tertiary) transparent transparent transparent !important;
}
.select2-dropdown {
    background: var(--bg-card-solid) !important;
    border: 1px solid var(--border-strong) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-lg) !important;
    overflow: hidden;
}
.select2-search--dropdown .select2-search__field {
    background: var(--bg-subtle) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-sm) !important;
    color: var(--text-primary) !important;
    padding: 8px 10px !important;
    font-family: inherit !important;
}
.select2-search--dropdown .select2-search__field:focus {
    border-color: var(--accent) !important;
    outline: none !important;
}
.select2-results__option {
    padding: 10px 14px !important;
    color: var(--text-primary) !important;
    font-size: 14px !important;
}
.select2-container--default .select2-results__option--highlighted[aria-selected] {
    background-color: var(--accent) !important;
    color: #FFFFFF !important;
}
.select2-container--default .select2-results__option[aria-selected=true] {
    background-color: var(--accent-soft) !important;
    color: var(--accent) !important;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
    .auth-card { padding: 32px 24px 28px; border-radius: 16px; }
    .auth-heading { font-size: 24px; }
    .theme-toggle { top: 14px; right: 14px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .auth-card, .alert { animation: none; }
    *, *::before, *::after { transition-duration: 0ms !important; }
}

/* =============================================================
   Real brand logo (replaces the "JF" gradient block)
   ============================================================= */
.brand { display: flex; justify-content: center; margin-bottom: 28px; }
.brand__logo {
    display: block;
    height: 44px;
    width: auto;
    max-width: 300px;
    object-fit: contain;
    transition: filter var(--dur-med) var(--ease);
}
[data-theme="dark"] .brand__logo { filter: invert(1) hue-rotate(180deg); }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .brand__logo { filter: invert(1) hue-rotate(180deg); }
}