/**

* SUNOSUNAO — RESPONSIVE DESIGN SYSTEM
* Design Version: 2.0
* File: public_html/assets/css/responsive.css
* 
* Purpose:
* - Device adaptation
* - Responsive typography
* - Responsive spacing
* - Touch-friendly interaction sizing
* - Mobile navigation refinements
* - Tablet refinements
* - Story rail/card adaptation
* - Audio player adaptation
* - Reading experience adaptation
* - Small-screen visual balance
* 
* Depends on:
* - core.css
* - layout.css
* - components.css
* 
* No backend logic.
* No story-specific content.
* No legacy styling.
  */

/* =========================================================

1. RESPONSIVE FOUNDATION
   ========================================================= */

:root {
--responsive-gutter: clamp(
1rem,
3vw,
var(--page-padding)
);

--responsive-section-gap: clamp(
    3.5rem,
    7vw,
    7rem
);

--responsive-card-gap: clamp(
    0.75rem,
    2vw,
    1.5rem
);

--responsive-touch-target: 44px;

}

/* =========================================================
02. LARGE DESKTOP
========================================================= */

@media (min-width: 1440px) {

:root {
    --page-padding: 2.75rem;
    --section-padding: 8rem;
}

.container {
    width: min(
        calc(100% - 5.5rem),
        var(--content-max)
    );
}

.hero__content {
    max-width: 900px;
}

.story-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.story-grid--featured {
    grid-template-columns:
        repeat(4, minmax(0, 1fr));
}

.story-rail {
    --rail-gap: 1.5rem;
}

.story-card {
    min-width: 230px;
}

.story-card--portrait {
    min-width: 210px;
}

}

/* =========================================================
03. DESKTOP REFINEMENT
========================================================= */

@media (min-width: 1181px) and (max-width: 1439px) {

:root {
    --page-padding: 2rem;
}

.site-header__inner {
    gap: 1.25rem;
}

.site-nav {
    gap: 1.25rem;
}

.hero__content {
    max-width: 760px;
}

.story-grid {
    grid-template-columns:
        repeat(4, minmax(0, 1fr));
}

.story-grid--featured {
    grid-template-columns:
        repeat(3, minmax(0, 1fr));
}

.story-card {
    min-width: 215px;
}

}

/* =========================================================
04. TABLET / SMALL DESKTOP
========================================================= */

@media (max-width: 1180px) {

:root {
    --page-padding: clamp(1.25rem, 4vw, 2rem);
    --section-padding: clamp(4rem, 8vw, 6rem);
    --header-height: 72px;
}

.container,
.container--wide,
.container--narrow {
    width: min(
        calc(100% - (var(--page-padding) * 2)),
        var(--content-max)
    );
}

.site-header__inner {
    gap: 1rem;
}

.site-nav {
    gap: 1rem;
}

.site-nav__link {
    font-size: 0.875rem;
}

.hero {
    min-height: 720px;
}

.hero__content {
    max-width: 680px;
}

.hero__title {
    max-width: 760px;
}

.story-grid {
    grid-template-columns:
        repeat(3, minmax(0, 1fr));
}

.story-grid--featured {
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
}

.story-rail {
    --rail-gap: 1rem;
}

.feature-split {
    grid-template-columns:
        minmax(0, 1fr)
        minmax(0, 1fr);
    gap: 2.5rem;
}

.creator-layout {
    grid-template-columns:
        minmax(180px, 240px)
        minmax(0, 1fr);
}

.audio-cinema {
    grid-template-columns:
        minmax(220px, 0.8fr)
        minmax(0, 1.2fr);
}

}

/* =========================================================
05. TABLET PORTRAIT
========================================================= */

@media (max-width: 960px) {

:root {
    --header-height: 68px;
}

.site-header__inner {
    min-height: var(--header-height);
}

.site-header__nav {
    display: none;
}

.site-header__actions {
    margin-left: auto;
}

.mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--responsive-touch-target);
    height: var(--responsive-touch-target);
}

.hero {
    min-height: 680px;
}

.hero__content {
    max-width: 620px;
}

.hero__actions {
    flex-wrap: wrap;
}

.story-grid {
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
}

.story-grid--compact {
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
}

.story-rail {
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    overscroll-behavior-x: contain;
}

.story-rail::-webkit-scrollbar {
    display: none;
}

.story-rail > * {
    scroll-snap-align: start;
}

.story-card {
    min-width: min(42vw, 260px);
}

.story-card--portrait {
    min-width: min(34vw, 220px);
}

.mood-grid {
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
}

.feature-split {
    grid-template-columns: 1fr;
}

.feature-split__media {
    order: 1;
}

.feature-split__content {
    order: 2;
}

.audio-cinema {
    grid-template-columns: 1fr;
}

.audio-cinema__visual {
    max-width: 520px;
    margin-inline: auto;
}

.experience-layout {
    grid-template-columns: 1fr;
}

.creator-layout {
    grid-template-columns: 1fr;
    text-align: center;
}

.creator-layout__media {
    max-width: 220px;
    margin-inline: auto;
}

.creator-layout__content {
    max-width: 680px;
    margin-inline: auto;
}

.footer__grid {
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
}

}

/* =========================================================
06. MOBILE
========================================================= */

@media (max-width: 720px) {

:root {
    --page-padding: 1rem;
    --section-padding: 3.75rem;
    --header-height: 64px;
    --radius-card: 16px;
    --radius-panel: 18px;
}

html {
    font-size: 15px;
}

body {
    overflow-x: hidden;
}

.container,
.container--wide,
.container--narrow,
.container--fluid {
    width: calc(100% - 2rem);
}

.page__section {
    padding-block: var(--section-padding);
}

.page__section--tight {
    padding-block: 2.5rem;
}

.page__section--large {
    padding-block: 5rem;
}

/* Header */

.site-header {
    min-height: var(--header-height);
}

.site-header__inner {
    min-height: var(--header-height);
}

.site-header__logo {
    max-width: 145px;
}

.site-header__actions {
    gap: 0.5rem;
}

.site-header__actions > * {
    min-width: var(--responsive-touch-target);
    min-height: var(--responsive-touch-target);
}

/* Hero */

.hero {
    min-height: 620px;
    align-items: flex-end;
}

.hero__content {
    width: 100%;
    max-width: none;
    padding-bottom: 2rem;
}

.hero__title {
    max-width: 100%;
}

.hero__description {
    max-width: 100%;
}

.hero__actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
}

.hero__actions .button,
.hero__actions .btn {
    width: 100%;
}

/* Section headings */

.section-header {
    align-items: flex-start;
    gap: 0.75rem;
}

.section-header__title {
    max-width: 100%;
}

.section-header__action {
    flex-shrink: 0;
}

/* Story grids */

.story-grid,
.story-grid--featured,
.story-grid--compact {
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.story-card {
    min-width: 0;
}

.story-card__content {
    padding: 0.75rem;
}

.story-card__meta {
    gap: 0.4rem;
}

.story-card__description {
    display: none;
}

.story-card__actions {
    margin-top: 0.5rem;
}

/* Rails */

.story-rail {
    margin-inline:
        calc(var(--page-padding) * -1);
    padding-inline:
        var(--page-padding);
}

.story-rail > * {
    min-width: 42vw;
}

.story-rail--portrait > * {
    min-width: 32vw;
}

/* Mood */

.mood-grid {
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.mood-card {
    min-height: 130px;
}

/* Continue */

.continue-grid {
    grid-template-columns: 1fr;
}

.continue-card {
    min-height: 190px;
}

/* Search */

.discovery-search {
    width: 100%;
}

.search-field {
    min-height: 52px;
}

/* Audio */

.audio-cinema {
    gap: 1.5rem;
}

.audio-player {
    padding: 1rem;
}

.audio-player__controls {
    gap: 0.5rem;
}

.audio-player__main {
    grid-template-columns: 1fr;
}

.audio-player__timeline {
    order: 2;
}

.audio-player__actions {
    order: 1;
}

.fixed-player {
    inset-inline: 0.75rem;
    bottom: 0.75rem;
}

/* CTA */

.cta-panel {
    padding: 1.5rem;
}

.cta-panel__actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
}

.cta-panel__actions .button,
.cta-panel__actions .btn {
    width: 100%;
}

/* Footer */

.footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
}

}

/* =========================================================
07. SMALL MOBILE
========================================================= */

@media (max-width: 480px) {

:root {
    --page-padding: 0.875rem;
    --section-padding: 3.25rem;
}

html {
    font-size: 14px;
}

.container,
.container--wide,
.container--narrow,
.container--fluid {
    width: calc(100% - 1.75rem);
}

.site-header__logo {
    max-width: 125px;
}

.site-header__actions {
    gap: 0.25rem;
}

.hero {
    min-height: 570px;
}

.hero__content {
    padding-bottom: 1.5rem;
}

.story-grid,
.story-grid--featured,
.story-grid--compact {
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
}

.story-card {
    border-radius: var(--radius-card);
}

.story-card__content {
    padding: 0.65rem;
}

.story-card__title {
    font-size: 0.9rem;
}

.story-card__meta {
    font-size: 0.7rem;
}

.story-rail > * {
    min-width: 46vw;
}

.story-rail--portrait > * {
    min-width: 35vw;
}

.mood-grid {
    gap: 0.6rem;
}

.mood-card {
    min-height: 110px;
    padding: 0.9rem;
}

.avatar {
    width: 42px;
    height: 42px;
}

.modal {
    padding: 0.75rem;
}

.modal__content {
    border-radius: 18px;
}

.drawer {
    width: min(88vw, 380px);
}

}

/* =========================================================
08. VERY SMALL DEVICES
========================================================= */

@media (max-width: 360px) {

:root {
    --page-padding: 0.75rem;
}

.container,
.container--wide,
.container--narrow,
.container--fluid {
    width: calc(100% - 1.5rem);
}

.site-header__logo {
    max-width: 110px;
}

.story-grid,
.story-grid--featured,
.story-grid--compact {
    gap: 0.5rem;
}

.story-card__content {
    padding: 0.55rem;
}

.story-card__title {
    font-size: 0.84rem;
}

.story-card__meta {
    font-size: 0.65rem;
}

.hero__actions {
    gap: 0.5rem;
}

.button,
.btn {
    min-height: 46px;
}

}

/* =========================================================
09. TOUCH DEVICES
========================================================= */

@media (hover: none) and (pointer: coarse) {

.button,
.btn,
.icon-button,
.cinematic-icon-button,
.mobile-nav-toggle,
.site-nav__link,
.chip,
.filter-chip {
    min-height: var(--responsive-touch-target);
}

.button,
.btn,
.icon-button,
.cinematic-icon-button {
    touch-action: manipulation;
}

.story-card:hover,
.feature-panel:hover,
.mood-card:hover {
    transform: none;
}

.story-card__overlay {
    opacity: 1;
}

.story-rail {
    scrollbar-width: none;
    overscroll-behavior-x: contain;
}

}

/* =========================================================
10. POINTER DEVICES
========================================================= */

@media (hover: hover) and (pointer: fine) {

.story-card,
.mood-card,
.feature-panel,
.interactive-surface {
    transition:
        transform var(--motion-duration-normal)
            var(--motion-ease-standard),
        border-color var(--motion-duration-fast)
            var(--motion-ease-standard),
        box-shadow var(--motion-duration-normal)
            var(--motion-ease-standard);
}

}

/* =========================================================
11. LANDSCAPE MOBILE
========================================================= */

@media (max-width: 900px) and (orientation: landscape) {

.hero {
    min-height: 520px;
}

.hero__content {
    max-width: 620px;
    padding-bottom: 1.5rem;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
}

.hero__actions .button,
.hero__actions .btn {
    width: auto;
}

.mobile-drawer,
.drawer {
    max-height: 90vh;
    overflow-y: auto;
}

}

/* =========================================================
12. READING EXPERIENCE
========================================================= */

@media (max-width: 720px) {

.reading-layout {
    width: 100%;
}

.reading-layout__content {
    width: min(
        100%,
        680px
    );
    margin-inline: auto;
}

.reading-layout__text {
    font-size: 1.05rem;
    line-height: 1.85;
}

.reading-layout__controls {
    position: sticky;
    bottom: 0.75rem;
    margin-inline: 0.75rem;
    z-index: var(--z-sticky);
}

}

/* =========================================================
13. FULL-SCREEN EXPERIENCE
========================================================= */

@media (max-width: 720px) {

.experience-screen {
    min-height: 100svh;
    min-height: 100dvh;
}

.experience-screen__content {
    padding-inline: var(--page-padding);
}

.experience-screen__controls {
    padding-bottom:
        max(
            1rem,
            env(safe-area-inset-bottom)
        );
}

}

/* =========================================================
14. SAFE AREA SUPPORT
========================================================= */

@supports (padding: env(safe-area-inset-bottom)) {

.site-header {
    padding-top:
        env(safe-area-inset-top);
}

.fixed-player {
    bottom:
        max(
            0.75rem,
            env(safe-area-inset-bottom)
        );
}

.mobile-nav,
.drawer {
    padding-bottom:
        max(
            1rem,
            env(safe-area-inset-bottom)
        );
}

}

/* =========================================================
15. HIGH-DENSITY DISPLAY REFINEMENT
========================================================= */

@media (min-resolution: 2dppx) {

.story-card__media,
.hero__backdrop,
.feature-split__media,
.experience-screen__media {
    image-rendering: auto;
}

}

/* =========================================================
16. REDUCED MOTION
========================================================= */

@media (prefers-reduced-motion: reduce) {

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

.story-rail {
    scroll-behavior: auto;
}

}

/* =========================================================
17. PRINT
========================================================= */

@media print {

.site-header,
.site-footer,
.fixed-player,
.mobile-nav,
.drawer,
.modal,
.hero__backdrop,
.cinematic-overlay {
    display: none !important;
}

.page,
.page__main {
    width: 100%;
    min-height: auto;
    background: #fff;
    color: #000;
}

.container,
.container--wide,
.container--narrow {
    width: 100%;
    max-width: none;
}

.story-card,
.feature-panel,
.cta-panel {
    break-inside: avoid;
    box-shadow: none;
}

a {
    color: #000;
    text-decoration: underline;
}

}