/* Shared auth layer for login.html and signup.html.
 *
 * These two pages are self-contained — they do not link style.css — so the
 * design tokens, interaction rules, and accessibility handling they need live
 * here rather than being duplicated in each page's <style>.
 *
 * IMPORTANT: link this AFTER the page's own <style> block. It intentionally
 * overrides base rules (.form-input:focus, .submit-btn, .bg-img, .form-panel
 * and others). Loading it earlier silently reverts them.
 */

/* ── Design tokens ─────────────────────────────────────────
   These pages are self-contained (they never link style.css), so
   the site's tokens and accessibility rules have to live here too. */
:root {
    --accent: #0ea5e9;
    --accent-2: #6366f1;
    --accent-3: #8b5cf6;
    --ink: #0f172a;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --dur-fast: 0.15s;
    --dur-mid: 0.25s;
    --dur-slow: 0.4s;

    /* Movement lives as tokens so reduced-motion can zero it in one
       place — see the guard at the end of this sheet. */
    --lift-1: -3px;
    --press: 0.97;
    --nudge-1: 4px;
}

/* ── Numerals ──────────────────────────────────────────── */
input {
    font-variant-numeric: tabular-nums;
}

/* ── Motion ────────────────────────────────────────────── */
@keyframes authRise {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes panelDrift {
    0%   { transform: scale(1.05) translate3d(0, 0, 0); }
    50%  { transform: scale(1.11) translate3d(-1.5%, -1.5%, 0); }
    100% { transform: scale(1.05) translate3d(0, 0, 0); }
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}

@keyframes meshShift {
    0%, 100% { background-position: 0% 50%, 100% 50%; }
    50%      { background-position: 30% 20%, 70% 80%; }
}

/* The side image drifts instead of sitting dead still. */
.bg-img {
    animation: panelDrift 30s var(--ease) infinite;
    will-change: transform;
}

.logo-box {
    animation: logoFloat 4.5s var(--ease) infinite;
    transition: background var(--dur-mid) var(--ease),
                transform var(--dur-mid) var(--ease);
}

.logo-box:hover {
    background: rgba(255, 255, 255, 0.22);
}

/* Ambient colour behind the form, so it isn't a flat slate field. */
.form-panel {
    background-color: #f8fafc;
    background-image:
        radial-gradient(38rem 38rem at 8% -10%, rgba(14, 165, 233, 0.16), transparent 60%),
        radial-gradient(32rem 32rem at 100% 105%, rgba(139, 92, 246, 0.14), transparent 62%);
    background-repeat: no-repeat;
    animation: meshShift 18s var(--ease) infinite;
}

/* Form rises in, field by field. */
.form-header,
.form-group,
.submit-btn,
.bottom-link,
.form-error,
.forgot-link {
    animation: authRise 0.55s var(--ease) backwards;
}

.form-header  { animation-delay: 0.05s; }
.form-group:nth-of-type(1) { animation-delay: 0.12s; }
.form-group:nth-of-type(2) { animation-delay: 0.19s; }
.form-group:nth-of-type(3) { animation-delay: 0.26s; }
.form-group:nth-of-type(4) { animation-delay: 0.33s; }
.submit-btn   { animation-delay: 0.40s; }
.bottom-link  { animation-delay: 0.47s; }

.side-content > * {
    animation: authRise 0.7s var(--ease) backwards;
}

.side-content > *:nth-child(1) { animation-delay: 0.1s; }
.side-content > *:nth-child(2) { animation-delay: 0.22s; }
.side-content > *:nth-child(3) { animation-delay: 0.34s; }

/* ── Interaction ───────────────────────────────────────── */

/* Fields answer the pointer before they're focused, and the label
   picks up the accent while its field is active. */
.form-input {
    transition: border-color var(--dur-mid) var(--ease),
                box-shadow var(--dur-mid) var(--ease),
                background var(--dur-mid) var(--ease),
                transform var(--dur-fast) var(--ease);
}

.form-input:hover:not(:focus) {
    border-color: #cbd5e1;
}

.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.16);
}

.form-group:focus-within .form-label {
    color: var(--accent);
}

.form-label {
    transition: color var(--dur-mid) var(--ease);
}

/* ── Custom select (select.css) ─────────────────────────
   select.css defaults to the dashboard's larger fields. Re-size the trigger
   to match the inputs on these pages, and map the few palette tokens it
   expects that the auth pages don't define. */
.cs {
    --cs-radius: 6px;
    --cs-pad-y: 10px;
    --cs-pad-x: 14px;
    --cs-font: 0.9rem;

    --border-color: #cbd5e1;
    --border-hover: #94a3b8;
    --field-bg: transparent;   /* .form-input here is transparent */
    --text-main: #1a1a1a;
    --text-muted: #94a3b8;
    --accent-primary: var(--accent);
    --nav-active-text: var(--accent);
    --info-bg: rgba(14, 165, 233, 0.16);
    --bg-surface: #fff;
    --shadow-lg: 0 16px 34px -6px rgba(15, 23, 42, 0.18);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* The panel is portalled to <body>, so it sits outside .cs and can't inherit
   the tokens above — it needs them here too. */
.cs-panel {
    --text-main: #1a1a1a;
    --text-muted: #94a3b8;
    --accent-primary: var(--accent);
    --nav-active-text: var(--accent);
    --border-color: #e2e8f0;
    --bg-surface: #fff;
    --shadow-lg: 0 16px 34px -6px rgba(15, 23, 42, 0.18);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Phone field with country flag ─────────────────────── */
.phone-field {
    position: relative;
    display: flex;
    align-items: center;
}

/* Room for the flag so the number never runs under it. */
.phone-field .form-input {
    padding-left: 54px;
}

.phone-flag {
    position: absolute;
    left: 1px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 46px;
    height: calc(100% - 2px);
    border-radius: 10px 0 0 10px;
    border-right: 1px solid #e2e8f0;
    pointer-events: none;
    user-select: none;
    transition: border-color var(--dur-mid) var(--ease);
}

.phone-field:focus-within .phone-flag {
    border-right-color: var(--accent);
}

.phone-flag img {
    display: block;
    width: 22px;
    height: 16px;
    border-radius: 2px;
    object-fit: cover;
    box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.12);
    animation: flagIn var(--dur-mid) var(--ease);
}

/* Shown until a country code is recognised, and if the image fails. */
#signup-flag-code {
    font-size: 0.8rem;
    font-weight: 700;
    color: #94a3b8;
    letter-spacing: 0.02em;
}

@keyframes flagIn {
    from { opacity: 0; transform: scale(0.7); }
    to { opacity: 1; transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
    .phone-flag img { animation: none; }
}

/* ── Password visibility toggle ────────────────────────── */
.input-with-toggle {
    position: relative;
    display: flex;
    align-items: center;
}

/* Leave room for the button so long values never run under it. */
.input-with-toggle .form-input {
    padding-right: 46px;
}

.pw-toggle {
    position: absolute;
    right: 6px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: none;
    border-radius: 7px;
    background: transparent;
    color: #94a3b8;
    cursor: pointer;
    transition: color var(--dur-mid) var(--ease),
                background var(--dur-mid) var(--ease),
                transform var(--dur-fast) var(--ease);
}

.pw-toggle:hover {
    color: var(--accent);
    background: rgba(14, 165, 233, 0.1);
}

.pw-toggle:active {
    transform: scale(var(--press));
    transition-duration: 0.06s;
}

.pw-toggle:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

/* Catch-all so any button added later presses in like the rest of the site.
   The named rules above still win where they set their own transform. */
button {
    transition: transform var(--dur-fast) var(--ease),
                background var(--dur-mid) var(--ease),
                color var(--dur-mid) var(--ease),
                border-color var(--dur-mid) var(--ease);
}

button:active:not(:disabled) {
    transform: scale(var(--press));
    transition-duration: 0.06s;
}

/* Show the eye by default; swap to the struck-through eye once the
   password is visible. State lives on aria-pressed so the button
   stays accessible and the CSS has a single source of truth. */
.pw-toggle .pw-icon-hide { display: none; }
.pw-toggle[aria-pressed="true"] .pw-icon-show { display: none; }
.pw-toggle[aria-pressed="true"] .pw-icon-hide { display: block; }
.pw-toggle[aria-pressed="true"] { color: var(--accent); }

/* Submit lifts, presses, and sweeps its gradient. */
.submit-btn {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    background-size: 200% 100%;
    transition: transform var(--dur-fast) var(--ease),
                box-shadow var(--dur-mid) var(--ease),
                background-position var(--dur-slow) var(--ease),
                opacity var(--dur-mid) var(--ease);
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(var(--lift-1));
    box-shadow: 0 12px 26px -8px rgba(15, 23, 42, 0.55);
    background-position: 100% 0;
}

.submit-btn:active:not(:disabled) {
    transform: translateY(0) scale(var(--press));
    transition-duration: 0.06s;
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Links: sliding underline rather than a bare colour change. */
.bottom-link a,
.forgot-link {
    position: relative;
    display: inline-block;
    transition: color var(--dur-mid) var(--ease);
}

.bottom-link a::after,
.forgot-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 1.5px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--dur-mid) var(--ease);
}

.bottom-link a:hover::after,
.forgot-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* ── Focus ─────────────────────────────────────────────────
   :focus-visible only fires for keyboard/AT users. */
:where(a, button, input, select, textarea, [tabindex]):focus {
    outline: none;
}

:where(a, button, [tabindex]):focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 6px;
}

.form-input:focus-visible {
    outline: none;
}

/* ── Reduced motion ────────────────────────────────────────
   Zeroing the movement tokens neutralises every rule that uses them
   at once, so rules added later stay covered. Infinite loops are
   stopped outright rather than run at 0.01ms. */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    :root {
        --lift-1: 0px;
        --press: 1;
        --nudge-1: 0px;
    }

    /* Keep the scale, or the backdrop pops back and letterboxes. */
    .bg-img {
        animation: none !important;
        transform: scale(1.05);
    }

    .logo-box,
    .form-panel {
        animation: none !important;
    }

    .bottom-link a:hover::after,
    .forgot-link:hover::after {
        transform: scaleX(1);
    }
}