/* ==========================================================================
   OPAH Button System — "studio light"
   --------------------------------------------------------------------------
   One shared button layer for the talent + client web app.

   Concept: a button is a physical surface under a key light. It has a bright
   top edge, a falloff toward its base, and a contact shadow grounding it to
   the page. Hovering raises it into the light; pressing settles it back into
   the surface. This replaces the old flat-fill + neon-halo treatment.

   Usage
     <button class="btn btn-primary">Save</button>
     <button class="btn btn-secondary btn-sm">Cancel</button>
     <button class="btn btn-ghost btn-icon" aria-label="Close">…</button>

   Variants  : primary | secondary | ghost | outline | danger | warning
   Sizes     : btn-sm | (default) | btn-lg
   Modifiers : btn-icon (square) | btn-round (circular) | btn-block (full width)
   States    : :disabled / .is-disabled, .is-loading, :focus-visible

   Variant classes also work standalone (`class="btn-primary"`), because a
   number of templates omit the base `.btn`.
   ========================================================================== */

:root {
    /* Brand */
    --btn-accent:            #19E332;
    --btn-accent-lift:       #34f94c;
    --btn-accent-sink:       #12bf28;
    --btn-accent-ink:        #052e0c;   /* near-black w/ a green cast */
    --btn-accent-ring:       rgba(25, 227, 50, 0.55);

    --btn-danger:            #f04444;
    --btn-danger-lift:       #ff5b5b;
    --btn-danger-sink:       #cf2f2f;

    --btn-warning:           #f5a524;
    --btn-warning-lift:      #ffb63f;
    --btn-warning-sink:      #d98a12;

    /* Neutral surface (dark is the app default) */
    --btn-surface-top:       #26262b;
    --btn-surface-bottom:    #1a1a1e;
    --btn-surface-border:    #313138;
    --btn-surface-ink:       #e9e9ec;
    --btn-muted-ink:         #a1a1aa;

    /* Light physics */
    --btn-keylight:          rgba(255, 255, 255, 0.10);
    --btn-keylight-strong:   rgba(255, 255, 255, 0.42);
    --btn-falloff:           rgba(0, 0, 0, 0.20);
    --btn-contact:           0 1px 2px rgba(0, 0, 0, 0.34);
    --btn-contact-hover:     0 3px 8px -1px rgba(0, 0, 0, 0.42);
    --btn-ambient:           0 6px 18px -8px rgba(0, 0, 0, 0.55);

    /* Geometry */
    --btn-radius:            11px;
    --btn-radius-sm:         9px;
    --btn-radius-lg:         13px;

    /* Motion — a short, slightly overshooting settle */
    --btn-ease:              cubic-bezier(0.2, 0.8, 0.3, 1);
    --btn-speed:             140ms;
}

/* --------------------------------------------------------------------------
   1. Base
   -------------------------------------------------------------------------- */

.btn,
.btn-primary,
.btn-secondary,
.btn-ghost,
.btn-outline,
.btn-danger,
.btn-danger-solid,
.btn-warning,
.btn-warning-solid,
/* Legacy names still in the markup. They are real buttons, so they need the
   base geometry, focus ring and disabled treatment too — see section 10, which
   only gives them their surface. */
.btn-confirm,
.btn-cancel,
.btn-discard {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    min-height: 40px;
    margin: 0;
    border: 1px solid transparent;
    border-radius: var(--btn-radius);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.01em;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    isolation: isolate;
    transition:
        background-color var(--btn-speed) var(--btn-ease),
        border-color     var(--btn-speed) var(--btn-ease),
        box-shadow       var(--btn-speed) var(--btn-ease),
        color            var(--btn-speed) var(--btn-ease),
        transform        var(--btn-speed) var(--btn-ease),
        filter           var(--btn-speed) var(--btn-ease);
}

/* Icons inside a button should never be squashed by a global button padding
   rule, and should optically match the label weight. */
.btn > svg,
.btn-primary > svg,
.btn-secondary > svg,
.btn-ghost > svg,
.btn-outline > svg,
.btn-danger > svg,
.btn-danger-solid > svg,
.btn-warning > svg,
.btn-warning-solid > svg,
.btn-confirm > svg,
.btn-cancel > svg,
.btn-discard > svg {
    flex: 0 0 auto;
    width: 16px;
    height: 16px;
    display: block;
    padding: 0;
}

/* --------------------------------------------------------------------------
   2. Sizes
   -------------------------------------------------------------------------- */

.btn-sm {
    padding: 7px 13px;
    min-height: 32px;
    font-size: 13px;
    border-radius: var(--btn-radius-sm);
    gap: 6px;
}
.btn-sm > svg { width: 14px; height: 14px; }

.btn-lg,
.btn-large {
    padding: 14px 26px;
    min-height: 50px;
    font-size: 15px;
    border-radius: var(--btn-radius-lg);
    gap: 10px;
}
.btn-lg > svg,
.btn-large > svg { width: 18px; height: 18px; }

.btn-block {
    display: flex;
    width: 100%;
}

/* Square icon-only button — keeps a true 1:1 box so the icon stays centred. */
.btn-icon {
    padding: 0;
    width: 40px;
    min-width: 40px;
    height: 40px;
    min-height: 40px;
}
.btn-icon.btn-sm  { width: 32px; min-width: 32px; height: 32px; min-height: 32px; }
.btn-icon.btn-lg  { width: 50px; min-width: 50px; height: 50px; min-height: 50px; }
.btn-round { border-radius: 999px; }

/* --------------------------------------------------------------------------
   3. Variant — primary
   -------------------------------------------------------------------------- */

.btn-primary {
    background-color: var(--btn-accent);
    background-image: linear-gradient(
        180deg,
        var(--btn-accent-lift) 0%,
        var(--btn-accent) 52%,
        var(--btn-accent-sink) 100%
    );
    color: var(--btn-accent-ink);
    border-color: rgba(0, 0, 0, 0.14);
    box-shadow:
        inset 0 1px 0 var(--btn-keylight-strong),
        inset 0 -1px 0 var(--btn-falloff),
        var(--btn-contact),
        0 6px 18px -8px rgba(25, 227, 50, 0.50);
}

.btn-primary:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    transform: translateY(-1px);
    filter: brightness(1.06);
    box-shadow:
        inset 0 1px 0 var(--btn-keylight-strong),
        inset 0 -1px 0 var(--btn-falloff),
        var(--btn-contact-hover),
        0 10px 24px -8px rgba(25, 227, 50, 0.58);
}

/* The key light sweeping across the surface. Purely decorative.
   `overflow: hidden` keeps the sweep inside the radius; it does not clip the
   element's own box-shadow, so the contact/ambient layers survive. */
.btn-primary { overflow: hidden; }

.btn-primary::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 2;
    border-radius: inherit;
    background: linear-gradient(
        105deg,
        transparent 34%,
        rgba(255, 255, 255, 0.28) 50%,
        transparent 66%
    );
    transform: translateX(-130%);
    opacity: 0;
    pointer-events: none;
    transition: transform 620ms var(--btn-ease), opacity 180ms linear;
}
.btn-primary:hover:not(:disabled):not(.is-disabled):not(.is-loading)::after {
    transform: translateX(130%);
    opacity: 1;
}

/* --------------------------------------------------------------------------
   4. Variant — secondary (default neutral surface)
   -------------------------------------------------------------------------- */

.btn,
.btn-secondary {
    background-color: var(--btn-surface-bottom);
    background-image: linear-gradient(
        180deg,
        var(--btn-surface-top) 0%,
        var(--btn-surface-bottom) 100%
    );
    color: var(--btn-surface-ink);
    border-color: var(--btn-surface-border);
    box-shadow:
        inset 0 1px 0 var(--btn-keylight),
        var(--btn-contact);
}

/* A bare `.btn` gets the neutral hover, but a `.btn` that also carries a
   variant must not — this rule sits after the variant rules and would win at
   equal specificity. The selector-list `:not()` keeps the exclusion cheap:
   its specificity is one class, not one per argument. */
.btn:hover:not(:disabled):not(.is-disabled):not(.is-loading):not(
    .btn-primary, .btn-ghost, .btn-outline,
    .btn-danger, .btn-danger-solid,
    .btn-warning, .btn-warning-solid,
    .btn-confirm, .btn-cancel, .btn-discard),
.btn-secondary:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    transform: translateY(-1px);
    border-color: #45454e;
    filter: brightness(1.12);
    box-shadow:
        inset 0 1px 0 var(--btn-keylight),
        var(--btn-contact-hover),
        var(--btn-ambient);
}

/* A `.btn` carrying a variant must not keep the neutral surface. */
.btn.btn-primary,
.btn.btn-ghost,
.btn.btn-outline,
.btn.btn-danger,
.btn.btn-danger-solid,
.btn.btn-warning,
.btn.btn-warning-solid {
    background-image: none;
}
.btn.btn-primary {
    background-color: var(--btn-accent);
    background-image: linear-gradient(
        180deg,
        var(--btn-accent-lift) 0%,
        var(--btn-accent) 52%,
        var(--btn-accent-sink) 100%
    );
    color: var(--btn-accent-ink);
    border-color: rgba(0, 0, 0, 0.14);
}
.btn.btn-danger        { background-color: rgba(240, 68, 68, 0.11); }
.btn.btn-warning       { background-color: rgba(245, 165, 36, 0.12); }
.btn.btn-danger-solid  { background-color: var(--btn-danger); }
.btn.btn-warning-solid { background-color: var(--btn-warning); }

/* --------------------------------------------------------------------------
   5. Variant — ghost & outline
   -------------------------------------------------------------------------- */

.btn-ghost {
    background: transparent;
    background-image: none;
    color: var(--btn-muted-ink);
    border-color: transparent;
    box-shadow: none;
}
.btn-ghost:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    background: rgba(255, 255, 255, 0.07);
    color: var(--btn-surface-ink);
    transform: none;
    box-shadow: none;
}

.btn-outline {
    background: transparent;
    background-image: none;
    color: var(--btn-surface-ink);
    border-color: var(--btn-surface-border);
    box-shadow: none;
}
.btn-outline:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    border-color: var(--btn-accent);
    color: var(--btn-accent);
    background: rgba(25, 227, 50, 0.07);
    transform: translateY(-1px);
    box-shadow: var(--btn-contact);
}

/* --------------------------------------------------------------------------
   6. Variant — danger & warning
   -------------------------------------------------------------------------- */

/* The app's established convention is a *tinted* destructive action — these
   mostly live inside content lists (delete a portfolio piece, decline a
   booking) where a solid red block would dominate the row. So tinted is the
   default, and the loud filled treatment is opt-in via `-solid` for modal
   confirmations, where shouting is the point. */

.btn-danger {
    background: rgba(240, 68, 68, 0.11);
    background-image: none;
    color: #ff7a7a;
    border-color: rgba(240, 68, 68, 0.30);
    box-shadow: none;
}
.btn-danger:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    background: rgba(240, 68, 68, 0.19);
    border-color: rgba(240, 68, 68, 0.50);
    color: #ff9494;
    transform: translateY(-1px);
    box-shadow: var(--btn-contact);
}

.btn-danger-solid {
    background-color: var(--btn-danger);
    background-image: linear-gradient(
        180deg,
        var(--btn-danger-lift) 0%,
        var(--btn-danger) 52%,
        var(--btn-danger-sink) 100%
    );
    color: #fff;
    border-color: rgba(0, 0, 0, 0.18);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.24),
        inset 0 -1px 0 var(--btn-falloff),
        var(--btn-contact),
        0 6px 18px -8px rgba(240, 68, 68, 0.38);
}
.btn-danger-solid:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    transform: translateY(-1px);
    filter: brightness(1.06);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.24),
        inset 0 -1px 0 var(--btn-falloff),
        var(--btn-contact-hover),
        0 10px 24px -8px rgba(240, 68, 68, 0.46);
}

.btn-warning {
    background: rgba(245, 165, 36, 0.12);
    background-image: none;
    color: #f7bf5c;
    border-color: rgba(245, 165, 36, 0.30);
    box-shadow: none;
}
.btn-warning:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    background: rgba(245, 165, 36, 0.20);
    border-color: rgba(245, 165, 36, 0.50);
    color: #ffd08a;
    transform: translateY(-1px);
    box-shadow: var(--btn-contact);
}

.btn-warning-solid {
    background-color: var(--btn-warning);
    background-image: linear-gradient(
        180deg,
        var(--btn-warning-lift) 0%,
        var(--btn-warning) 52%,
        var(--btn-warning-sink) 100%
    );
    color: #2b1a00;
    border-color: rgba(0, 0, 0, 0.18);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.32),
        inset 0 -1px 0 var(--btn-falloff),
        var(--btn-contact);
}
.btn-warning-solid:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    transform: translateY(-1px);
    filter: brightness(1.06);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.32),
        inset 0 -1px 0 var(--btn-falloff),
        var(--btn-contact-hover);
}

/* --------------------------------------------------------------------------
   7. Pressed — the surface settles back down
   -------------------------------------------------------------------------- */

.btn:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-primary:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-secondary:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-ghost:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-outline:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-danger:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-danger-solid:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-warning:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-warning-solid:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-confirm:active:not(:disabled),
.btn-cancel:active:not(:disabled),
.btn-discard:active:not(:disabled) {
    /* Overrides the legacy global `button:active { transform: scale(.97) }` */
    transform: translateY(1px) scale(0.995);
    filter: brightness(0.97);
    transition-duration: 60ms;
    box-shadow:
        inset 0 2px 4px rgba(0, 0, 0, 0.26),
        inset 0 1px 0 rgba(0, 0, 0, 0.10);
}
.btn-ghost:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-danger:active:not(:disabled):not(.is-disabled):not(.is-loading),
.btn-warning:active:not(:disabled):not(.is-disabled):not(.is-loading) {
    box-shadow: none;
}

/* --------------------------------------------------------------------------
   8. Focus — a real, visible ring (previously missing app-wide)
   -------------------------------------------------------------------------- */

.btn:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.btn-ghost:focus-visible,
.btn-outline:focus-visible,
.btn-danger:focus-visible,
.btn-danger-solid:focus-visible,
.btn-warning:focus-visible,
.btn-warning-solid:focus-visible,
.btn-confirm:focus-visible,
.btn-cancel:focus-visible,
.btn-discard:focus-visible {
    outline: 2px solid var(--btn-accent);
    outline-offset: 2px;
}
/* On the green button itself, the green ring would disappear — invert it. */
.btn-primary:focus-visible,
.btn.btn-primary:focus-visible {
    outline-color: #ffffff;
}

/* --------------------------------------------------------------------------
   9. Disabled & loading
   -------------------------------------------------------------------------- */

.btn:disabled,
.btn-primary:disabled,
.btn-secondary:disabled,
.btn-ghost:disabled,
.btn-outline:disabled,
.btn-danger:disabled,
.btn-danger-solid:disabled,
.btn-warning:disabled,
.btn-warning-solid:disabled,
.btn-confirm:disabled,
.btn-cancel:disabled,
.btn-discard:disabled,
.btn.is-disabled,
.is-disabled.btn-primary,
.is-disabled.btn-secondary,
.is-disabled.btn-danger,
.is-disabled.btn-confirm {
    cursor: not-allowed;
    opacity: 0.45;
    transform: none;
    filter: grayscale(0.35);
    box-shadow: none;
}
.btn:disabled::after,
.btn-primary:disabled::after,
.btn.is-disabled::after {
    display: none;
}

.btn.is-loading,
.is-loading.btn-primary,
.is-loading.btn-secondary,
.is-loading.btn-danger {
    cursor: progress;
    color: transparent !important;
    pointer-events: none;
}
.btn.is-loading::before,
.is-loading.btn-primary::before,
.is-loading.btn-secondary::before,
.is-loading.btn-danger::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 15px;
    height: 15px;
    margin: -7.5px 0 0 -7.5px;
    border: 2px solid currentColor;
    border-radius: 50%;
    border-top-color: transparent;
    opacity: 0.9;
    animation: opah-btn-spin 620ms linear infinite;
}
.is-loading.btn-primary::before  { border-color: var(--btn-accent-ink); border-top-color: transparent; }
.is-loading.btn-secondary::before,
.btn.is-loading::before          { border-color: var(--btn-surface-ink); border-top-color: transparent; }
.is-loading.btn-danger::before   { border-color: #fff; border-top-color: transparent; }

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

/* --------------------------------------------------------------------------
   10. Aliases for legacy variant names already in the markup
   -------------------------------------------------------------------------- */

.btn-confirm {
    background-color: var(--btn-accent);
    background-image: linear-gradient(
        180deg,
        var(--btn-accent-lift) 0%,
        var(--btn-accent) 52%,
        var(--btn-accent-sink) 100%
    );
    color: var(--btn-accent-ink);
    border-color: rgba(0, 0, 0, 0.14);
    box-shadow:
        inset 0 1px 0 var(--btn-keylight-strong),
        inset 0 -1px 0 var(--btn-falloff),
        var(--btn-contact);
}
/* Match the primary hover so the alias is not a second-class citizen. */
.btn-confirm:hover:not(:disabled) {
    transform: translateY(-1px);
    filter: brightness(1.06);
    box-shadow:
        inset 0 1px 0 var(--btn-keylight-strong),
        inset 0 -1px 0 var(--btn-falloff),
        var(--btn-contact-hover),
        0 10px 24px -8px rgba(25, 227, 50, 0.58);
}

.btn-cancel,
.btn-discard {
    background: transparent;
    background-image: none;
    color: var(--btn-muted-ink);
    border-color: var(--btn-surface-border);
    box-shadow: none;
}
.btn-cancel:hover:not(:disabled),
.btn-discard:hover:not(:disabled) {
    color: var(--btn-surface-ink);
    border-color: #52525b;
}

/* --------------------------------------------------------------------------
   10b. The "new project" floating action button
   --------------------------------------------------------------------------
   Shared across the client + talent app shells. It carries the OPAH mark
   rather than a label, so the surface stays dark and the brand green lives in
   the ring — filling it green would bury the logo. Same studio-light physics
   as the rest of the system: crisp edge, contact shadow, ambient bounce.
   -------------------------------------------------------------------------- */

.nav-new-project-btn {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 900;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    padding: 0;
    border-radius: 50%;
    border: 1.5px solid rgba(25, 227, 50, 0.85);
    background-color: #141418;
    background-image: linear-gradient(180deg, #1e1e24 0%, #101014 100%);
    text-decoration: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.07),
        0 2px 6px rgba(0, 0, 0, 0.45),
        0 10px 28px -10px rgba(0, 0, 0, 0.7),
        0 0 0 4px rgba(25, 227, 50, 0.09);
    transition:
        transform  var(--btn-speed) var(--btn-ease),
        box-shadow var(--btn-speed) var(--btn-ease),
        border-color var(--btn-speed) var(--btn-ease);
}

.nav-new-project-btn:hover {
    transform: translateY(-2px);
    border-color: var(--btn-accent);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.10),
        0 4px 10px rgba(0, 0, 0, 0.5),
        0 16px 36px -12px rgba(0, 0, 0, 0.75),
        0 0 0 6px rgba(25, 227, 50, 0.14);
}

.nav-new-project-btn:active {
    transform: translateY(0) scale(0.97);
    transition-duration: 60ms;
    box-shadow:
        inset 0 2px 5px rgba(0, 0, 0, 0.4),
        0 1px 3px rgba(0, 0, 0, 0.4),
        0 0 0 4px rgba(25, 227, 50, 0.10);
}

.nav-new-project-btn:focus-visible {
    outline: 2px solid var(--btn-accent);
    outline-offset: 3px;
}

body.light-mode .nav-new-project-btn {
    border-color: rgba(20, 199, 43, 0.9);
    background-color: #ffffff;
    background-image: linear-gradient(180deg, #ffffff 0%, #f2f2f4 100%);
    box-shadow:
        inset 0 1px 0 #ffffff,
        0 2px 6px rgba(9, 9, 11, 0.10),
        0 10px 26px -12px rgba(9, 9, 11, 0.28),
        0 0 0 4px rgba(20, 199, 43, 0.10);
}
body.light-mode .nav-new-project-btn:hover {
    box-shadow:
        inset 0 1px 0 #ffffff,
        0 4px 10px rgba(9, 9, 11, 0.13),
        0 16px 34px -14px rgba(9, 9, 11, 0.34),
        0 0 0 6px rgba(20, 199, 43, 0.16);
}

@media (prefers-reduced-motion: reduce) {
    .nav-new-project-btn { transition: box-shadow 1ms linear; }
    .nav-new-project-btn:hover,
    .nav-new-project-btn:active { transform: none; }
}

/* --------------------------------------------------------------------------
   11. Light mode
   -------------------------------------------------------------------------- */

body.light-mode {
    --btn-surface-top:       #ffffff;
    --btn-surface-bottom:    #f4f4f5;
    --btn-surface-border:    #dcdce1;
    --btn-surface-ink:       #18181b;
    --btn-muted-ink:         #52525b;

    --btn-keylight:          rgba(255, 255, 255, 0.9);
    --btn-falloff:           rgba(0, 0, 0, 0.10);
    --btn-contact:           0 1px 2px rgba(9, 9, 11, 0.10);
    --btn-contact-hover:     0 3px 8px -1px rgba(9, 9, 11, 0.14);
    --btn-ambient:           0 8px 20px -10px rgba(9, 9, 11, 0.22);

    /* The stock green is very light against white; sink it a little so the
       black label keeps its contrast — but keep the span tight so the button
       stays brand-vivid rather than going forest-dark at the base.
       #04240a on the darkest stop (#13c228) measures ~6.1:1. */
    --btn-accent:            #17d92f;
    --btn-accent-lift:       #2bee44;
    --btn-accent-sink:       #13c228;
    --btn-accent-ink:        #04240a;
}

/* Same exclusion as the dark rule — without it this would out-specify
   `.btn-primary:hover` and turn every green button neutral-white on hover. */
body.light-mode .btn:hover:not(:disabled):not(.is-disabled):not(.is-loading):not(
    .btn-primary, .btn-ghost, .btn-outline,
    .btn-danger, .btn-danger-solid,
    .btn-warning, .btn-warning-solid,
    .btn-confirm, .btn-cancel, .btn-discard),
body.light-mode .btn-secondary:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    border-color: #b9b9c2;
    filter: none;
    background-image: linear-gradient(180deg, #ffffff 0%, #ececef 100%);
}

body.light-mode .btn-primary {
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.38),
        inset 0 -1px 0 rgba(0, 0, 0, 0.14),
        var(--btn-contact),
        0 6px 18px -8px rgba(20, 199, 43, 0.42);
}

body.light-mode .btn-ghost {
    color: var(--btn-muted-ink);
}
body.light-mode .btn-ghost:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    background: rgba(9, 9, 11, 0.06);
    color: var(--btn-surface-ink);
}

body.light-mode .btn-outline {
    color: var(--btn-surface-ink);
}
body.light-mode .btn-outline:hover:not(:disabled):not(.is-disabled):not(.is-loading) {
    color: #0d8f1f;
    border-color: #14c72b;
    background: rgba(20, 199, 43, 0.08);
}

body.light-mode .btn-danger {
    background: rgba(220, 38, 38, 0.08);
    color: #c92a2a;
    border-color: rgba(220, 38, 38, 0.24);
}
body.light-mode .btn-danger:hover:not(:disabled) {
    background: rgba(220, 38, 38, 0.14);
    border-color: rgba(220, 38, 38, 0.42);
    color: #a81f1f;
}

body.light-mode .btn-warning {
    background: rgba(180, 111, 8, 0.10);
    color: #96590a;
    border-color: rgba(180, 111, 8, 0.26);
}
body.light-mode .btn-warning:hover:not(:disabled) {
    background: rgba(180, 111, 8, 0.17);
    border-color: rgba(180, 111, 8, 0.44);
    color: #7a4808;
}
body.light-mode .btn-warning-solid { color: #2b1a00; }

body.light-mode .btn-cancel,
body.light-mode .btn-discard {
    color: var(--btn-muted-ink);
    border-color: var(--btn-surface-border);
}

/* --------------------------------------------------------------------------
   12. Motion & contrast preferences
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    .btn,
    .btn-primary,
    .btn-secondary,
    .btn-ghost,
    .btn-outline,
    .btn-danger,
    .btn-danger-solid,
    .btn-warning,
    .btn-warning-solid {
        transition: background-color 1ms linear, color 1ms linear;
    }
    .btn:hover,
    .btn-primary:hover,
    .btn-secondary:hover,
    .btn-outline:hover,
    .btn-danger:hover,
    .btn-warning:hover,
    .btn:active,
    .btn-primary:active,
    .btn-secondary:active,
    .btn-danger:active {
        transform: none;
    }
    .btn-primary::after { display: none; }
    .btn.is-loading::before,
    .is-loading.btn-primary::before,
    .is-loading.btn-secondary::before,
    .is-loading.btn-danger::before {
        animation-duration: 2s;
    }
}

/* Touch devices get no hover lift — it sticks after a tap. */
@media (hover: none) {
    .btn:hover,
    .btn-primary:hover,
    .btn-secondary:hover,
    .btn-outline:hover,
    .btn-danger:hover,
    .btn-warning:hover {
        transform: none;
        filter: none;
    }
    .btn-primary:hover::after { display: none; }
}

@media (forced-colors: active) {
    .btn,
    .btn-primary,
    .btn-secondary,
    .btn-ghost,
    .btn-outline,
    .btn-danger,
    .btn-danger-solid,
    .btn-warning,
    .btn-warning-solid {
        border: 1px solid ButtonBorder;
        box-shadow: none;
    }
}