:root {
    --bg-color: #f1f5f9;
    /* Corkboard simplistic fallback */
    --cork-pattern: radial-gradient(#e2e8f0 15%, transparent 16%) 0 0, radial-gradient(#e2e8f0 15%, transparent 16%) 8px 8px;
    --text-main: #334155;
    --font-ui: 'Outfit', sans-serif;
    --font-note: 'Kalam', cursive;

    --col-green: #dcfce7;
    --col-green-dark: #15803d;
    --note-green: #dcfce7;

    --col-orange: #ffEdd5;
    --col-orange-dark: #c2410c;
    --note-orange: #ffEdd5;

    --col-blue: #dbeafe;
    --col-blue-dark: #1e40af;
    --note-blue: #dbeafe;
}

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

body {
    font-family: var(--font-ui);
    background-color: var(--bg-color);
    background-image: var(--cork-pattern);
    background-size: 16px 16px;
    color: var(--text-main);
    min-height: 100vh;
}

.home-btn {
    position: absolute;
    top: 20px;
    left: 20px;
    text-decoration: none;
    color: #475569;
    background: white;
    padding: 10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    border: 1px solid #cbd5e1;
    transition: all 0.3s;
    z-index: 100;
    font-size: 1.5rem;
}

.home-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.app-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding-top: 20px;
}

header h1 {
    font-size: 2.5rem;
    color: #1e293b;
    margin-bottom: 5px;
}

header p {
    color: #64748b;
}

.board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    align-items: start;
}

.column {
    background: rgba(255, 255, 255, 0.6);
    border-radius: 16px;
    padding: 20px;
    min-height: 400px;
    backdrop-filter: blur(5px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.column-header {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 10px;
    border-bottom: 2px solid;
}

.header-green {
    color: var(--col-green-dark);
    border-color: rgba(21, 128, 61, 0.2);
}

.header-orange {
    color: var(--col-orange-dark);
    border-color: rgba(194, 65, 12, 0.2);
}

.header-blue {
    color: var(--col-blue-dark);
    border-color: rgba(30, 64, 175, 0.2);
}

.add-note-container {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.add-note-container input {
    flex: 1;
    padding: 10px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-family: var(--font-ui);
}

.add-note-container input:focus {
    outline: none;
    border-color: #64748b;
}

.btn-add {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: transform 0.2s;
}

.btn-add:hover {
    transform: scale(1.05);
}

.btn-green {
    background: var(--col-green-dark);
}

.btn-orange {
    background: var(--col-orange-dark);
}

.btn-blue {
    background: var(--col-blue-dark);
}

.notes-area {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.note-card {
    padding: 15px;
    border-radius: 2px;
    /* Post-it style sharp/slightly rounded */
    box-shadow: 2px 4px 6px rgba(0, 0, 0, 0.1);
    font-family: var(--font-note);
    font-size: 1.2rem;
    position: relative;
    transition: transform 0.2s;
    cursor: grab;
    word-wrap: break-word;
    transform: rotate(-1deg);
}

.note-card:hover {
    transform: rotate(0deg) scale(1.02);
    box-shadow: 4px 8px 12px rgba(0, 0, 0, 0.15);
    z-index: 10;
}

.note-card:nth-child(even) {
    transform: rotate(1deg);
}

.note-card:nth-child(3n) {
    transform: rotate(-1.5deg);
}

.note-well {
    background-color: var(--note-green);
    color: #064e3b;
}

.note-improve {
    background-color: var(--note-orange);
    color: #7c2d12;
}

.note-action {
    background-color: var(--note-blue);
    color: #1e3a8a;
}

.delete-note {
    position: absolute;
    top: 5px;
    right: 5px;
    background: transparent;
    border: none;
    color: inherit;
    opacity: 0.4;
    cursor: pointer;
    font-size: 1rem;
    transition: opacity 0.2s;
}

.note-card:hover .delete-note {
    opacity: 1;
}

.btn-clear-all {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: white;
    border: 2px solid #ef4444;
    color: #ef4444;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

.btn-clear-all:hover {
    background: #ef4444;
    color: white;
    transform: rotate(15deg);
}

.btn-share {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: white;
    border: 2px solid #3b82f6;
    color: #3b82f6;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

.btn-share:hover {
    background: #3b82f6;
    color: white;
    transform: translateY(-5px);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    animation: fadeIn 0.3s forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.modal-content {
    background: white;
    width: 95%;
    max-width: 650px;
    border-radius: 24px;
    padding: 0;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    max-height: 90vh;
    transform: scale(0.95);
    animation: scaleIn 0.3s 0.1s forwards cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
}

@keyframes scaleIn {
    to {
        transform: scale(1);
    }
}

.modal-header {
    background: linear-gradient(to right, #f8fafc, #fff);
    padding: 24px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #e2e8f0;
}

.modal-header h2 {
    font-size: 1.75rem;
    color: #1e293b;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.5px;
}

.btn-close-modal {
    background: #f1f5f9;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    color: #64748b;
    transition: all 0.2s;
}

.btn-close-modal:hover {
    background: #e2e8f0;
    color: #ef4444;
    transform: rotate(90deg);
}

.export-preview {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
    background: #fff;
    margin: 0;
    font-family: var(--font-ui);
    color: #334155;
    line-height: 1.6;
}

/* Paper effect for preview content if needed, but clean white is good for "preview" */
.export-preview::-webkit-scrollbar {
    width: 8px;
}

.export-preview::-webkit-scrollbar-track {
    background: #f1f5f9;
}

.export-preview::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

.export-actions {
    background: #f8fafc;
    padding: 20px 32px;
    display: flex;
    gap: 16px;
    justify-content: flex-end;
    border-top: 1px solid #e2e8f0;
}

.btn-action {
    padding: 12px 24px;
    border-radius: 12px;
    border: none;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-ui);
    transition: all 0.2s;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.btn-copy {
    background: white;
    color: #0f172a;
    border: 1px solid #e2e8f0;
}

.btn-copy:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
    transform: translateY(-1px);
}

.btn-word {
    background: #2563eb;
    color: white;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
}

.btn-word:hover {
    background: #1d4ed8;
    box-shadow: 0 6px 8px -1px rgba(37, 99, 235, 0.3);
    transform: translateY(-1px);
}