/* =========================================
   1. VARIABLES & BASE RESET
   ========================================= */
:root {
    --cork: #5d4037;
    --cork-dark: #3e2723;
    --paper: #fff9c4; 
    --blue: #bbdefb;
    --green: #c8e6c9;
    --pink: #ffcdd2;
    --text: #222; 
    --white: #ffffff;
    --time-col-width: 65px;
    --day-col-width: 160px; 
    --error: #b71c1c;
}

* { 
    box-sizing: border-box; 
    -webkit-tap-highlight-color: transparent; 
    outline: none; 
}

body, html { 
    margin: 0; 
    padding: 0; 
    font-family: 'Courier New', Courier, monospace; 
    background: var(--cork); 
    color: var(--text); 
    overflow: hidden; 
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.hidden { display: none !important; }
#export-canvas { display: none; }

/* =========================================
   2. MAIN LAYOUT & WRAPPERS
   ========================================= */
.board-wrapper {
    height: 100vh; 
    display: flex; 
    flex-direction: column;
    background-color: var(--cork);
    background-image: 
        radial-gradient(circle at 2px 2px, rgba(0,0,0,0.15) 1px, transparent 0), 
        repeating-linear-gradient(45deg, rgba(0,0,0,0.05) 0px, rgba(0,0,0,0.05) 2px, transparent 2px, transparent 4px);
    background-size: 4px 4px, 100% 100%;
    position: relative; 
}

.scroll-container { 
    flex-grow: 1; 
    overflow: auto; 
    scrollbar-width: none; 
}

.scroll-container::-webkit-scrollbar { 
    display: none; 
}

.balangkas-grid { 
    display: grid; 
    width: max-content; 
    min-width: 100%; 
    min-height: 100%; 
    transition: all 0.3s ease; 
}

/* =========================================
   3. APP HEADER & FAB
   ========================================= */
header { 
    background: rgba(0,0,0,0.4); 
    border-bottom: 2px dashed rgba(255,255,255,0.1);
    color: var(--white); 
    padding: 10px 10px;
    display: flex; 
    justify-content: space-between; 
    align-items: center;
    gap: 5px; 
}

.brand {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
}

header h1 { 
    margin: 0; 
    font-size: 1.1rem; 
    letter-spacing: 1px;
    display: flex; 
    align-items: baseline;
    width: 100%;
}

#board-title {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent; 
    color: inherit;
    font-family: inherit;
    font-size: inherit;
    font-weight: 900;
    padding: 0;
    margin: 0;
    width: auto; 
    min-width: 3ch;
    max-width: calc(100vw - 110px); 
    transition: border-bottom-color 0.2s;
    border-radius: 0;
    outline: none;
    text-overflow: clip;
    white-space: nowrap;
}

#board-title:focus {
    border-bottom: 2px solid rgba(255,255,255,0.8); 
}

#sw-version-display {
    opacity: 0.3;
    font-size: 0.55rem;
    margin-left: 4px;
    flex-shrink: 0;
}

.main-nav {
    flex-shrink: 0; 
}

.flat-header-btn {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.3);
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: background 0.2s;
}

.flat-fab {
    position: fixed;
    bottom: 25px;
    right: 25px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--header);
    color: white;
    border: none;
    font-size: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    cursor: pointer;
    z-index: 1000;
    transition: transform 0.2s;

    padding: 0;
    flex-shrink: 0;
    aspect-ratio: 1 / 1;
    line-height: 1;
}

.flat-fab:active { 
    transform: scale(0.9); 
}

/* =========================================
   4. GRID COMPONENTS (HEADERS & TIME)
   ========================================= */
.sticky-row { position: sticky; top: 0; z-index: 25; }

.sticky-col { 
    position: sticky; 
    left: 0; 
    z-index: 30; 
    background-color: var(--cork-dark); 
}

.day-header { 
    background: var(--cork-dark); 
    color: var(--white); 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-weight: bold; 
    font-size: 0.75rem; 
    border-right: 1px solid rgba(255,255,255,0.1); 
    text-transform: lowercase; 
    min-width: 160px; 
}

.time-header, .time-label, .time-filler { 
    background: var(--cork-dark); 
    color: var(--paper); 
    border-right: 2px dashed rgba(255,255,255,0.1); 
}

.time-header, .time-label { 
    font-size: 0.6rem; 
    font-weight: bold; 
    display: flex; 
    align-items: center; 
    border-bottom: 1px solid rgba(255,255,255,0.05); 
}

.time-header {
    justify-content: center;
    padding: 10px 2px; 
}

.time-label {
    width: 100%;
    justify-content: center !important;
    text-align: center;
    background-color: transparent !important;
    pointer-events: none;
}

.time-header.sticky-col.sticky-row {
    z-index: 60 !important; 
    background-color: var(--cork-dark); 
    box-shadow: 0 2px 5px rgba(0,0,0,0.2); 
}

.empty-board-msg {
    position: absolute;
    top: 55%; 
    left: 50%;
    transform: translate(-50%, -50%);
    color: rgba(255,255,255,0.2);
    font-weight: 900;
    text-transform: lowercase;
    font-style: italic;
    text-align: center;
    width: 80%;
    max-width: 250px; 
    pointer-events: none;
    z-index: 5;
    line-height: 1.4;
}

/* =========================================
   5. SUBJECT CARDS
   ========================================= */
.subject-card {
    position: relative; 
    margin: 3px auto; 
    padding: 8px 6px; 
    font-size: 0.75rem;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.3); 
    transform: rotate(var(--tilt, 0deg));
    cursor: pointer; 
    display: flex; 
    flex-direction: column; 
    justify-content: flex-start;
    background-image: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    border-bottom-right-radius: 12px 3px; 
    color: var(--text) !important;
    transition: transform 0.2s, filter 0.2s;
    border: 1px solid transparent; 
    width: calc(100% - 10px); 
    max-width: 160px; 
    z-index: 10;
    height: 150px; 
    align-self: start; 
}

.sub-name { 
    font-weight: 800; 
    border-bottom: 1px solid rgba(0,0,0,0.1); 
    margin-bottom: 2px; 
    padding-bottom: 2px; 
    text-transform: none; 
}

.sub-code { font-size: 0.65rem; font-style: italic; font-weight: 600; text-transform: uppercase; } 

.sub-prof, .sub-room, .sub-desc { 
    font-size: 0.65rem; 
    font-weight: 700; 
    display: block;
    overflow-wrap: anywhere; 
    word-break: break-word;
}

.sub-room a {
    color: inherit;
    text-decoration: underline;
    cursor: pointer;
    opacity: 0.9;
}

.sub-room a:hover {
    opacity: 1;
}

/* =========================================
   6. SIDE NAVIGATION
   ========================================= */
.side-nav {
    position: fixed;
    top: 0;
    right: -370px;
    width: 350px;
    height: 100%;
    background-color: var(--cork); 
    z-index: 2000; 
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -15px 0 40px rgba(0,0,0,0.7);
    padding: 15px; 
    box-sizing: border-box; 
    overflow-y: auto;
    display: flex;
    justify-content: center;
}

.side-nav.open { right: 0 !important; }

#menu-overlay { 
    background: rgba(0,0,0,0.4); 
    z-index: 1999; 
    cursor: pointer;
}

.nav-content { 
    height: auto !important; 
    padding: 30px 20px !important; 
    transform: rotate(1deg); 
    margin-top: 20px; 
    opacity: 1 !important; 
}

.close-nav { 
    position: absolute; 
    top: 10px; 
    right: 15px; 
    background: none; 
    border: none; 
    font-size: 2.2rem; 
    cursor: pointer; 
    color: var(--cork-dark); 
    font-weight: 900; 
}

.nav-title { text-transform: lowercase; margin-bottom: 10px; }
.nav-divider { border: 0; border-top: 1px dashed rgba(0,0,0,0.1); margin: 20px 0; }
.app-version-text { font-size: 0.7rem; opacity: 0.6; text-align: center; }
.user-id-text { font-weight: bold; font-size: 0.8rem; margin: 10px 0; word-break: break-all; text-align: center; }

.sync-status-nav {
    font-size: 0.7rem;
    font-weight: bold;
    color: var(--cork-dark);
    margin: 5px 0 15px;
    text-transform: lowercase;
    text-align: center;
    opacity: 0.8;
}

#sync-status { color: var(--cork); text-decoration: underline; }

.flat-nav-btn, .login-btn-design {
    width: 100%;
    background-color: var(--white);
    border: 2px solid var(--cork-dark);
    padding: 12px;
    font-family: inherit;
    font-weight: 900;
    text-transform: lowercase;
    cursor: pointer;
    margin-bottom: 10px;
    box-shadow: 4px 4px 0 var(--cork-dark);
    display: block;
    transition: transform 0.1s, box-shadow 0.1s;
}

.flat-nav-btn:active, .login-btn-design:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--cork-dark) !important;
}

.logout-btn { 
    width: 100%; 
    padding: 12px; 
    margin-top: 15px; 
    background-color: var(--pink); 
    border: 2px solid var(--error); 
    color: var(--error) !important; 
    font-family: inherit; 
    font-weight: 900; 
    text-transform: lowercase; 
    cursor: pointer; 
    box-shadow: 4px 4px 0 var(--error);
    transition: transform 0.1s, box-shadow 0.1s;
    display: block;
}

.logout-btn:active { 
    transform: translate(2px, 2px); 
    box-shadow: 2px 2px 0 var(--error) !important; 
}

@media (max-width: 768px) {
    .side-nav {
        width: 75%;
        right: -80%;
    }
}

/* =========================================
   7. MODALS & FORMS
   ========================================= */
.overlay { 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    background: rgba(0,0,0,0.6); 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    z-index: 1500; 
    padding: 15px; 
}

.sticky-note { 
    background: var(--paper); 
    padding: 25px; 
    width: 100%; 
    max-width: 320px; 
    box-shadow: 5px 5px 25px rgba(0,0,0,0.5); 
    transform: rotate(-1deg); 
    opacity: 0;
}

.overlay:not(.hidden) .sticky-note {
    animation: modal-pop-in 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.overlay.closing .sticky-note {
    animation: modal-pop-out 0.2s ease-in forwards;
}

.delete-note, .conflict-note, .auth-note {
    max-width: 260px;
    margin: 0 auto;
}

.delete-note p, .conflict-note p, .auth-note p {
    text-align: center;
    font-size: 0.8rem;
    margin-bottom: 15px;
}

.cancel-text-link {
    font-size: 0.65rem;
    text-decoration: underline;
    cursor: pointer;
    opacity: 0.5;
    margin-top: 15px;
    display: block;
    text-align: center;
    transition: opacity 0.2s;
}

.cancel-text-link:active {
    opacity: 1;
    color: var(--error);
}

/* Form Inputs */
#subject-form input { 
    width: 100%; 
    padding: 10px; 
    margin: 6px 0; 
    border: none; 
    border-bottom: 1px solid rgba(0,0,0,0.1); 
    background: transparent; 
    font-family: inherit; 
    font-weight: bold; 
    color: var(--text); 
    caret-color: var(--cork); 
    user-select: text;
}

#subject-form input::placeholder { 
    font-weight: normal; 
    opacity: 0.5; 
}

/* Day & Time Selectors */
.day-selector { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.day-tag { font-size: 0.75rem; padding: 6px 10px; border-radius: 4px; background: rgba(0,0,0,0.05); border: 1px solid rgba(0,0,0,0.1); cursor: pointer; font-weight: bold; text-transform: lowercase; transition: all 0.2s ease; }
.day-tag.active { background: var(--text); color: var(--white); border-color: var(--text); }

.time-row { display: flex; align-items: center; gap: 8px; margin: 10px 0; font-size: 0.8rem; font-weight: bold; padding: 5px; border-radius: 4px; text-transform: lowercase; }
.time-row input { width: auto !important; padding: 5px !important; }

/* Color Picker */
.color-picker { display: flex; gap: 10px; margin: 15px 0; }
.color-opt { width: 28px; height: 28px; border-radius: 50%; cursor: pointer; border: 1px solid rgba(0,0,0,0.2); transition: transform 0.2s; }
.color-opt:has(input:checked) { border-color: var(--text); transform: scale(1.1); }
.color-opt input { display: none; }
.yellow { background: var(--paper); } .blue { background: var(--blue); } .green { background: var(--green); } .pink { background: var(--pink); }

/* Form Buttons */
.form-actions { 
    display: flex; 
    justify-content: stretch; 
    align-items: center; 
    gap: 10px; 
    margin-top: 20px; 
    flex-wrap: nowrap; 
}

.action-group { display: contents; }

.form-actions button { 
    flex: 1; 
    width: auto; 
    min-width: 0; 
    white-space: nowrap; 
    padding: 10px 4px !important; 
    font-family: inherit;
    font-weight: 900;
    text-transform: lowercase;
    cursor: pointer;
    border: 2px solid var(--cork-dark);
    background-color: var(--white);
    box-shadow: 4px 4px 0 var(--cork-dark);
    transition: transform 0.1s, box-shadow 0.1s;
}

.form-actions button:active {
    transform: translate(2px, 2px); 
    box-shadow: 2px 2px 0 var(--cork-dark); 
}

.btn-danger { 
    background-color: var(--pink) !important; 
    border: 2px solid var(--error) !important; 
    color: var(--error) !important; 
    box-shadow: 4px 4px 0 var(--error) !important;
}

.btn-danger:active { 
    box-shadow: 2px 2px 0 var(--error) !important; 
}

.changelog-link {
    display: block;
    text-align: center;
    font-size: 0.7rem;
    font-weight: 900;
    color: var(--cork-dark);
    text-decoration: underline;
    margin-top: 8px;
    opacity: 0.7;
    transition: opacity 0.2s;
    cursor: pointer;
}

.changelog-link:hover {
    opacity: 1;
}

.changelog-note {
    max-width: 350px !important;
    transform: rotate(1deg) !important;
}

.changelog-list {
    padding: 0;
    margin: 15px 0;
    list-style: none;
    max-height: 300px;
    overflow-y: auto;
    
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.changelog-list::-webkit-scrollbar {
    display: none;
}

.changelog-list li {
    font-size: 0.75rem;
    margin-bottom: 12px;
    line-height: 1.4;
    border-bottom: 1px dashed rgba(0,0,0,0.1);
    padding-bottom: 8px;
}

.changelog-list li strong {
    display: block;
    text-transform: lowercase;
    color: var(--cork-dark);
}

/* =========================================
   8. UTILITIES, ANIMATIONS & FEEDBACK
   ========================================= */
@keyframes modal-pop-in {
    0% { transform: scale(0.8) rotate(-2deg); opacity: 0; }
    100% { transform: scale(1) rotate(-1deg); opacity: 1; }
}

@keyframes modal-pop-out {
    0% { transform: scale(1) rotate(-1deg); opacity: 1; }
    100% { transform: scale(0.9) rotate(0deg); opacity: 0; }
}

@keyframes spin { 
    0% { transform: rotate(0deg); } 
    100% { transform: rotate(360deg); } 
}

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

.loader { 
    border: 4px solid rgba(0,0,0,0.1); 
    border-top: 4px solid var(--white); 
    border-radius: 50%; 
    width: 30px; 
    height: 30px; 
    animation: spin 1s linear infinite; 
    margin: 0 auto 15px; 
}

.shake {
    animation: shake 0.4s cubic-bezier(.36,.07,.19,.97) both;
}

.error-border {
    border-bottom: 2px solid var(--error) !important;
    background-color: rgba(183, 28, 28, 0.05) !important;
}

#time-input-group.error-border {
    border: 1px solid var(--error) !important;
    border-radius: 4px;
}

/* --- 💬 CHAR LIMIT BUBBLE --- */
.input-group { 
    position: relative; /* Anchor for the floating bubble */
}

.limit-tooltip {
    position: absolute;
    bottom: 100%;
    left: 0;
    margin-bottom: 8px;
    background: var(--error);
    color: var(--white);
    padding: 4px 8px;
    font-size: 0.65rem;
    font-weight: 900;
    border-radius: 4px;
    pointer-events: none; 
    opacity: 0;
    transform: translateY(5px);
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275); 
    z-index: 50;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    white-space: nowrap;
}

.limit-tooltip.show {
    opacity: 1;
    transform: translateY(0);
}

.limit-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 12px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--error) transparent transparent transparent;
}

/* =========================================
   9. DARK MODE OVERRIDES
   ========================================= */
body.dark-mode {
    --cork: #1a1210;
    --cork-dark: #0d0908;
    --paper: #2e2101;   
    --blue: #092035;    
    --green: #062708;   
    --pink: #572126;    
    --text: #e0e0e0;    
    --white: #ffffff;
}

/* Sync Status Visibility */
body.dark-mode .sync-status-nav {
    color: rgba(255,255,255,0.7);
}

body.dark-mode #sync-status {
    color: var(--white);
    text-decoration-color: rgba(255,255,255,0.5);
}

/* Dark Mode UI cleanup */
body.dark-mode header { background: rgba(0,0,0,0.8); }
body.dark-mode #board-title { color: var(--white); }
body.dark-mode .day-tag { background: rgba(255,255,255,0.05); color: var(--white); }
body.dark-mode .day-tag.active { background: var(--white); color: var(--cork-dark); }
body.dark-mode .sticky-note { color: var(--text); }

/* Force White Caret in Dark Mode */
body.dark-mode #subject-form input { 
    color: var(--white); 
    border-bottom-color: rgba(255,255,255,0.1); 
    caret-color: var(--white); 
}

/* Fix Time Column Visibility */
body.dark-mode .time-header, 
body.dark-mode .time-label { 
    color: var(--white) !important; 
    opacity: 0.9;
}

/* Standard Buttons (Dark Theme) */
body.dark-mode .flat-nav-btn, 
body.dark-mode .login-btn-design,
body.dark-mode .form-actions button {
    background-color: var(--cork-dark);
    color: var(--white);
    border-color: rgba(255,255,255,0.2);
    box-shadow: 4px 4px 0 rgba(0,0,0,0.5);
}

body.dark-mode .flat-nav-btn:active, 
body.dark-mode .login-btn-design:active,
body.dark-mode .form-actions button:active {
    box-shadow: 2px 2px 0 rgba(0,0,0,0.5);
}

/* Danger Buttons (Dark Theme) */
body.dark-mode .btn-danger,
body.dark-mode .logout-btn {
    background-color: #441010 !important; 
    color: #ff8a80 !important;           
    border: 2px solid #b71c1c !important; 
    box-shadow: 4px 4px 0 #000000 !important;
}

body.dark-mode .btn-danger:active,
body.dark-mode .logout-btn:active {
    box-shadow: 2px 2px 0 #000000 !important;
}

/* Cancel Button Visibility */
body.dark-mode .form-actions button:first-child {
    background-color: transparent;
    border-color: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.6);
    box-shadow: none;
}

body.dark-mode .changelog-list li {
    border-bottom-color: rgba(255,255,255,0.1);
}

body.dark-mode .changelog-list li strong {
    color: var(--white);
}

body.dark-mode .changelog-link {
    color: var(--white);
    opacity: 0.5;
}

body.dark-mode .changelog-link:hover {
    opacity: 0.9;
}