/* --- Basic Setup & Theming --- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

:root {
    --bg-color: #1a1a2e;
    --primary-color: #e0e0e0;
    --secondary-color: #b3b3b3;
    --accent-color: #4d84f3;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
    background-color: #000000;
    color: var(--primary-color);
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,1) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,1) 0, transparent 50%);
    background-attachment: fixed;
    background-size: 200% 200%;
    animation: liquid-bg 15s ease infinite;
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* --- Glassmorphism Elements --- */
.glass-header, .glass-card, .glass-btn, .glass-select, .glass-input, .glass-details, .tool-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    box-shadow: 0 4px 30px var(--shadow-color);
}

/* --- Header --- */
.glass-header {
    text-align: center;
    padding: 2rem;
    margin-bottom: 3rem;
}

.glass-header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(
        90deg,
        #ffffff 0%,
        #4d84f3 25%,
        #b3b3b3 50%,
        #4d84f3 75%,
        #ffffff 100%
    );
    background-size: 200% auto;
    color: #fff;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: liquid-text 3s linear infinite;
    text-shadow: 0 0 15px rgba(77, 132, 243, 0.4);
    letter-spacing: 1px;
    filter: drop-shadow(0 0 2px rgba(255,255,255,0.1));
}

.glass-header p {
    color: var(--secondary-color);
    font-size: 1.1rem;
}

/* Animations */
@keyframes liquid-bg {
    0% { background-position: 0% 0%; }
    50% { background-position: 100% 100%; }
    100% { background-position: 0% 0%; }
}

@keyframes liquid-text {
    to {
        background-position: 200% center;
    }
}

/* --- Main Hub Grid --- */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.tool-card {
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.tool-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 40px var(--shadow-color);
}

/* Ripple effect from JS */
.tool-card::before {
    content: '';
    position: absolute;
    top: var(--y);
    left: var(--x);
    transform: translate(-50%, -50%) scale(0);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-color) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0.2;
    transition: transform 0.5s, opacity 0.5s;
}

.tool-card:hover::before {
    transform: translate(-50%, -50%) scale(2);
    opacity: 0;
}


.tool-card h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.tool-card h2 i {
    margin-right: 0.5rem;
    color: var(--accent-color);
}

.tool-card p {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.use-tool-btn {
    width: 80%;
    padding: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
}

/* --- General Tool Interface Styles --- */
.tool-interface {
    padding: 2rem;
    animation: fadeIn 0.5s ease-in-out;
    position: relative;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-interface h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
}

.back-btn {
    position: absolute;
    top: 20px;
    left: 20px;
    padding: 0.5rem 1rem;
}

/* --- Buttons, Inputs, Selects --- */
.glass-btn, .tab-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.glass-btn:hover, .tab-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.glass-btn:active {
    transform: scale(0.95);
}

.tab-btn.active {
    background: var(--accent-color);
    color: white;
    font-weight: 600;
}

.glass-input, .glass-select {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    color: #ffffff;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
}

.glass-input::placeholder {
    color: var(--secondary-color);
}

.glass-select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23e0e0e0' class='bi bi-chevron-down' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.7rem top 50%;
    background-size: 1rem auto;
}

/* --- Specific Tool Styles --- */

/* Calculator */
.calculator {
    background: #1e1e1e;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 25px;
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
}

.display {
    background: #2d2d2d;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    text-align: right;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    word-wrap: break-word;
    word-break: break-all;
}

.previous-operand {
    color: #888;
    font-size: 1.2rem;
    margin-bottom: 5px;
    min-height: 25px;
}

.current-operand {
    color: #fff;
    font-size: 2rem;
    font-weight: bold;
    min-height: 40px;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.btn {
    background: #3a3a3a;
    border: none;
    border-radius: 10px;
    color: #fff;
    font-size: 1.2rem;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn:hover {
    background: #4a4a4a;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.btn.number {
    background: #505050;
}

.btn.number:hover {
    background: #606060;
}

.btn.operator {
    background: #ff9500;
}

.btn.operator:hover {
    background: #ffb143;
}

.btn.function {
    background: #5e5ce6;
    font-size: 1rem;
}

.btn.function:hover {
    background: #7c7aff;
}

.btn.equals {
    background: #34c759;
    grid-column: span 1;
}

.btn.span-3 {
    grid-column: span 3;
}

.btn.equals:hover {
    background: #5dd879;
}

/* Responsive Design for Calculator */
@media (max-width: 480px) {
    .calculator {
        padding: 15px;
    }
    
    .btn {
        padding: 15px;
        font-size: 1rem;
    }
    
    .current-operand {
        font-size: 1.5rem;
    }
    
    .previous-operand {
        font-size: 1rem;
    }
}

/* Calendar */
#calendar-tool {
    max-width: 900px;
    margin: 0 auto;
}
.calendar-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}
#current-month-year {
    font-size: 1.5rem;
    font-weight: 600;
}
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}
.calendar-day {
    padding: 0.5rem;
    text-align: center;
    border-radius: 8px;
    transition: background-color 0.2s;
    min-height: 85px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    cursor: pointer;
}
.calendar-day:nth-child(-n+7) {
    font-weight: 600;
    color: var(--secondary-color);
}
.calendar-day.other-month {
    opacity: 0.4;
}
.calendar-day.holiday {
    /* Removed full background to look more like Google Calendar */
    font-weight: normal;
}
.calendar-day.current-day {
    border: 2px solid var(--accent-color);
    box-shadow: 0 0 10px rgba(77, 132, 243, 0.3);
}
.date-number {
    font-weight: 600;
    margin-bottom: 4px;
}
.event-name {
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 4px;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.2;
    margin-top: 2px;
    text-align: left;
    color: white;
    box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
/* Google Calendar Style Event Colors */
.evt-public-holiday {
    background-color: #34a853; /* Google Green */
}
.evt-national-holiday {
    background-color: #ea4335; /* Google Red */
}
.evt-festival {
    background-color: #8e24aa; /* Purple for Festivals */
}
.custom-event-label {
    background-color: #039be5; /* Google Blue for user notes */
    font-style: normal;
}
#holiday-details {
    margin-top: 1rem;
    padding: 1rem;
    text-align: center;
}

/* World Clock */
.world-clock-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}
.clock-item {
    padding: 1.5rem;
    text-align: center;
}
.clock-item:hover {
    background: rgba(255, 255, 255, 0.1);
}
.clock-time {
    font-size: 1.75em;
    margin-top: 0.5rem;
    font-family: monospace;
}

/* Converter */
#converter-tool {
    max-width: 800px;
    margin: 0 auto;
}
.converter-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}
.converter-inputs {
    display: grid;
    grid-template-columns: 2fr 1.5fr auto 2fr 1.5fr;
    gap: 1rem;
    align-items: center;
}
.converter-inputs .equals {
    font-size: 2rem;
    text-align: center;
}

/* Timer */
#timer-tool {
    max-width: 600px;
    margin: 0 auto;
}
.st-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.st-display-container {
    padding: 2rem;
    text-align: center;
    margin-bottom: 1.5rem;
}
#st-display {
    font-size: 3em;
    font-family: monospace;
}
.timer-inputs {
    display: none; /* Controlled by JS */
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.timer-inputs input {
    width: 70px;
    text-align: center;
}
.st-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
}
.st-controls button {
    padding: 0.75rem 1.5rem;
    font-size: 1.1rem;
}

/* Notes */
/* Notepad */
#notes-tool {
    background: rgba(255, 255, 255, 0.15);
    padding: 20px;
    border-radius: 20px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
    width: 90%;
    max-width: 650px;
    text-align: center;
    backdrop-filter: blur(10px);
    animation: notepad-fadeIn 1s ease-in-out;
    margin: 0 auto;
}

#notes-tool.dark {
  color: #eee;
}

#notes-tool h2 {
  margin-bottom: 15px;
  font-size: 26px;
  animation: notepad-slideDown 0.8s ease;
}

#notes-tool .search-box {
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
  gap: 8px;
}

#notes-tool .search-box input {
  flex: 1;
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  outline: none;
  font-size: 15px;
}

#notes-tool .search-box button {
  padding: 8px 14px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  background: #fff;
  color: #333;
  transition: 0.3s;
}

#notes-tool .search-box button:hover {
  background: #764ba2;
  color: #fff;
}

#notes-tool .editor {
  position: relative;
  width: 100%;
  height: 300px;
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 8px;
}

#notes-tool #highlightLayer,
#notes-tool textarea {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 15px;
  font-size: 16px;
  line-height: 1.4;
  border-radius: 10px;
  box-sizing: border-box;
}

#notes-tool #highlightLayer {
  white-space: pre-wrap;
  word-wrap: break-word;
  color: transparent;
  pointer-events: none;
  overflow-y: auto;
}

#notes-tool mark {
  background: yellow;
  color: black;
  border-radius: 3px;
  padding: 0 2px;
}

#notes-tool textarea {
  background: rgba(255, 255, 255, 0.95);
  color: #333;
  resize: none;
  outline: none;
  border: none;
  box-shadow: inset 0 4px 10px rgba(0,0,0,0.2);
  z-index: 1;
}

#notes-tool.dark textarea {
  background: rgba(0, 0, 0, 0.6);
  color: #eee;
}

#notes-tool .counter {
  margin-top: 8px;
  font-size: 14px;
  font-weight: bold;
  color: #ffd700;
}

#notes-tool .buttons {
  margin-top: 15px;
}

#notes-tool .buttons button {
  background: #fff;
  color: #333;
  border: none;
  padding: 10px 18px;
  margin: 5px;
  font-size: 15px;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s ease, transform 0.2s ease;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  animation: notepad-fadeUp 1s ease;
}

#notes-tool .buttons button:hover {
  background: #764ba2;
  color: #fff;
  transform: scale(1.08) rotate(-1deg);
}

#notes-tool.dark .buttons button {
  background: #333;
  color: #eee;
}

#notes-tool.dark .buttons button:hover {
  background: #667eea;
  color: #fff;
}

#notes-tool #statusMsg {
  margin-top: 10px;
  font-size: 14px;
  color: #00ff99;
  transition: opacity 0.5s ease;
}

/* Search */
#search-tool {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}
.search-container input {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    text-align: center;
}
.search-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    .glass-header h1 {
        font-size: 2rem;
    }
    .back-btn {
        position: static;
        display: block;
        width: 100%;
        margin-bottom: 1rem;
        text-align: center;
    }
    .tool-interface {
        padding: 1rem;
    }
    .converter-inputs {
        grid-template-columns: 1fr;
    }
    .converter-inputs .equals {
        transform: rotate(90deg);
    }
    .calculator-buttons {
        gap: 0.25rem;
    }
    .calculator-display input {
        font-size: 2rem;
    }
    .notes-controls {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .tools-grid {
        grid-template-columns: 1fr;
    }
    .tool-interface h2 {
        font-size: 1.5rem;
    }
    #st-display {
        font-size: 2.2em;
    }
    .st-controls {
        flex-direction: column;
        gap: 0.5rem;
    }
    .st-controls button {
        width: 100%;
    }
    .search-buttons {
        flex-direction: column;
    }
    .search-buttons .glass-btn {
        width: 100%;
    }
}